My Custom Settings API Implementation for those of us who don't need bloated options panel libraries.

class-admin.php

<?php
/**
 * WooCommerce Order Generator Admin Options Page
 *
 * @since NEXT
 * @package WooCommerce Order Generator
 */

/**
 * WooCommerce Order Generator Admin.
 *
 * @since NEXT
 */
class WCOG_Admin {
	/**
	 * Parent plugin class
	 *
	 * @var   WooCommerce_Order_Generator
	 * @since NEXT
	 */
	protected $plugin = null;

	/**
	 * @var string
	 */
	protected $option_prefix = 'wcog_';

	/**
	 * Admin page hook
	 *
	 * @var String
	 */
	public $hook;

	/**
	 * Constructor
	 *
	 * @since  NEXT
	 * @param  WooCommerce_Order_Generator $plugin Main plugin object.
	 * @return void
	 */
	public function __construct( $plugin ) {
		$this->plugin = $plugin;
		$this->hooks();
	}

	/**
	 * Initiate our hooks
	 *
	 * @since  NEXT
	 * @return void
	 */
	public function hooks() {
		add_action( 'admin_init', array( $this, 'register_stuffs' ) );
		add_action( 'admin_menu', array( $this, 'admin_menu' ) );
	}

	/**
	 * Registering stuff, nothing special
	 *
	 * @author JayWood
	 */
	public function register_stuffs() {
		$min = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
		wp_register_script( 'wcog_admin', WooCommerce_Order_Generator::url( "assets/js/woocommerce-order-generator{$min}.js" ), array( 'jquery' ), $this->plugin->version, true );
		wp_register_style( 'wcog_admin', WooCommerce_Order_Generator::url( "assets/css/woocommerce-order-generator{$min}.css" ), false );
	}

	/**
	 * Load the admin menu up
	 *
	 * @author JayWood
	 */
	public function admin_menu() {
		$this->hook = add_management_page( __( 'Order Generator', 'woocommerce-order-generator' ), __( 'Order Generator', 'woocommerce-order-generator' ), 'manage_options', 'woocommerce-order-generator', array( $this, 'render_view' ) );

		// Setup sections etc...
		foreach ( $this->get_settings_config() as $section ) {
			add_settings_section( $section['id'], $section['name'], array( $this->plugin->settings, $section['group'] ), $this->hook );
			if ( isset( $section['fields'] ) ) {
				foreach ( $section['fields'] as $option_data ) {

					register_setting( 'woocommerce-order-generator', $this->option_prefix . $option_data['id'] );

					add_settings_field(
						$this->option_prefix . $option_data['id'],
						$option_data['name'],
						array(
							$this->plugin->settings,
							$option_data['type']
						),
						$this->hook,
						$section['id'],
						array(
							'id'      => $this->option_prefix . $option_data['id'],
							'name'    => $this->option_prefix . $option_data['id'],
							'desc'    => $option_data['desc'],
							'options' => isset( $option_data['options'] ) ? $option_data['options'] : false,
						)
					);
				}
			}
		}
	}

	/**
	 * The Settings Fields
	 * 
	 * type refers to a callable method inside the WCOG_Settings class
	 *
	 * @author JayWood
	 * @return array
	 */
	public function get_settings_config() {
		return array(
			array(
				'id' => 'general-settings',
				'name' => __( 'General Settings', 'woocommerce-order-generator' ),
				'group' => 'def_group',
				'fields' => array(
					array(
						'id' => 'max-products',
						'name' => __( 'Maximum Products', 'woocommerce-order-generator' ),
						'desc' => __( 'The maximum amount of products in a user order.', 'woocommerce-order-generator' ),
						'type' => 'number',
					),
					array(
						'id' => 'user_type',
						'name' => __( 'User Type', 'woocommerce-order-generator' ),
						'desc' => __( 'Determines rather the user should be a guest or registerd user.', 'woocommerce-order-generator' ),
						'type' => 'select',
						'options' => array(
							'registered' => __( 'Registered', 'woocommerce-order-generator' ),
							'guest' => __( 'Guest', 'woocommerce-order-generator' ),
						),
					),
				),
			)
		);
	}

	/**
	 * Render's the admin page
	 *
	 * @author JayWood
	 */
	public function render_view() {
		WooCommerce_Order_Generator::include_view( 'admin-settings' );
	}
}

settings.php

<?php

/**
 * Class WCOG_Settings
 * 
 * Handles the heavy lifting of building the options page.
 *
 * @author JayWood
 */
class WCOG_Settings {

	public function def_group() {}

	/**
	 * Just gets a default set of arguments to make sure they're always set.
	 *
	 * @param $args
	 *
	 * @author JayWood
	 * @return array
	 */
	private function get_default_args( $args ) {
		return wp_parse_args( $args, array(
			'id'      => '',
			'name'    => '',
			'desc'    => '',
			'default' => '',
			'options' => false,
		) );

	}

	/**
	 * @param array $haystack
	 * @param mixed $cur
	 * @param bool  $show
	 *
	 * @author JayWood
	 * @return string
	 */
	private function selected_array( $haystack, $cur, $show = true ) {
		if ( is_array( $haystack ) ) {
			if ( ! empty( $cur ) && in_array( $cur, $haystack ) ) {
				$cur = $haystack = 1;
			} else {
				$cur = 0;
				$haystack = 1;
			}
		}

		return selected( $haystack, $cur, $show );
	}

	/**
	 * @param array $haystack
	 * @param mixed $cur
	 * @param bool  $show
	 *
	 * @author JayWood
	 * @return string
	 */
	private function checked_array( $haystack, $cur, $show = true ) {
		if ( is_array( $haystack ) ) {
			if ( ! empty( $cur ) && in_array( $cur, $haystack ) ) {
				$cur = $haystack = 1;
			} else {
				$cur = 0;
				$haystack = 1;
			}
		}

		return checked( $haystack, $cur, $show );
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function check( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$options     = $args['options'];
		$default     = empty( $args['default'] ) ? array() : $args['default'];
		if ( ! $options || empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id , $default );

		?><fieldset><?php
		foreach ( $options as $op_value => $label ) {
			?>
			<label for="<?php echo $op_value; ?>">
				<input id="<?php echo $op_value; ?>" type="checkbox" value="<?php echo $op_value; ?>" name="<?php echo $field_id; ?>[]" <?php $this->checked_array( $option_value, $op_value ); ?>/><?php echo $label; ?>
			</label>
			<?php
		}
		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
		?></fieldset><?php
	}


	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function number( $args = array() ) {

		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? array() : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		$attributes = '';

		if ( ! empty( $options ) ) {
			foreach ( $options as $k => $v ) {
				$attributes .= $k . '="' . $v . '"';
			}
		}

		?><input type="number" name="<?php echo $field_id; ?>" value="<?php echo $option_value; ?>" id="<?php echo $field_id; ?>" <?php echo $attributes; ?>/><?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}

	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function text( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? array() : $args['default'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		?><input type="text" name="<?php echo $field_id; ?>" value="<?php echo esc_attr( $option_value ); ?>" id="<?php echo $field_id; ?>" class="regular-text" /><?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function radio( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$options     = $args['options'];
		$default     = $args['default'];
		if ( ! $options || empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		?><fieldset><?php
		foreach ( $options as $op_value => $label ) {

			?>
			<label for="<?php echo $op_value; ?>">
				<input id="<?php echo $op_value; ?>" type="radio" value="<?php echo $op_value; ?>" name="<?php echo $field_id; ?>" <?php checked( $option_value, $op_value ); ?>/><?php echo $label; ?>
			</label><br />
			<?php

		}
		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
		?></fieldset><?php
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function media( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$options     = $args['options'];
		$default     = $args['default'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		if ( ! empty( $option_value ) ) {
			$option_value = esc_url( $option_value );
		}

		$label = isset( $options['label'] ) ? $options['label'] : __( 'Upload', 'content-warning-v2' );
		$uploader_title = isset( $options['uploader-title'] ) ? sprintf( 'data-uploader-title="%s"', $options['uploader-title'] ) : '';
		$uploader_button = isset( $options['uploader-btn'] ) ? sprintf( 'data-uploader-btn-txt="%s"', $options['uploader-btn'] ) : '';

		?><fieldset>
		<input type="text" name="<?php echo $field_id; ?>" id="<?php echo $field_id; ?>" value="<?php echo $option_value; ?>" class="regular-text" />
		<input type="button" class="button button-secondary upload_image_button" value="<?php echo $label; ?>" data-target-id="<?php echo $field_id; ?>" <?php echo $uploader_button; ?> <?php echo $uploader_title; ?> />
		</fieldset><?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function color( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? '' : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );
		$attributes = '';

		if ( ! empty( $options ) ) {
			foreach ( $options as $k => $v ) {
				$attributes .= $k . '="' . $v . '"';
			}
		}

		?><input type="text" name="<?php echo $field_id; ?>" value="<?php echo esc_attr( $option_value ); ?>" id="<?php echo $field_id; ?>" class="regular-text color_select" <?php echo $attributes; ?>/><?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function textbox( $args = array() ) {

		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? '' : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		$attributes = '';

		if ( ! empty( $options ) ) {
			foreach ( $options as $k => $v ) {
				$attributes .= $k . '="' . $v . '"';
			}
		}

		?><textarea name="<?php echo $field_id; ?>" id="<?php echo $field_id; ?>" class="regular-text" <?php echo $attributes; ?>><?php echo esc_attr( $option_value ); ?></textarea><?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	public function editor( $args = array() ) {

		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? '' : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );

		wp_editor( $option_value, $field_id, $options );

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	public function select( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? '' : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );
		?>
		<select name="<?php echo $field_id; ?>" id="<?php echo $field_id; ?>">
			<?php foreach ( $options as $k => $v ) : ?>
				<option value="<?php echo $k; ?>" <?php selected( $option_value, $k ); ?>><?php echo $v; ?></option>
			<?php endforeach; ?>
		</select>
		<?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}

	/**
	 * @param array $args
	 *
	 * @author JayWood
	 */
	public function select2_multi( $args = array() ) {
		$args = $this->get_default_args( $args );

		$field_id    = $args['id'];
		$description = $args['desc'];
		$default     = empty( $args['default'] ) ? '' : $args['default'];
		$options     = empty( $args['options'] ) ? array() : $args['options'];
		if ( empty( $field_id ) ) {
			return;
		}

		$option_value = get_option( $field_id, $default );
		?>
		<select name="<?php echo $field_id; ?>[]" id="<?php echo $field_id; ?>" class="cwv2_select2 widefat" multiple="multiple">
			<?php foreach ( $options as $k => $v ) : ?>
				<option value="<?php echo $k; ?>" <?php $this->selected_array( $option_value, $k ); ?>><?php echo $v; ?></option>
			<?php endforeach; ?>
		</select>
		<?php

		if ( ! empty( $description ) ) {
			?><p class="description"><?php echo $description; ?></p><?php
		}
	}
}

view.php

<div class="wrap">
	<h1><?php _e( 'Order Generator', 'woocommerce-order-generator' ); ?></h1>
	<p><?php _e( 'You will need to setup some basic settings for the generator.', 'woocommerce-order-generator' ); ?></p>
	<form method="post" action="options.php">
		<?php settings_fields( 'woocommerce-order-generator' ); ?>
    <?php // admin is a property of the main class, which references the class-admin.php below ?>
		<?php do_settings_sections( WooCommerce_Order_Generator::get_instance()->admin->hook ); ?>
		<?php submit_button(); ?>
	</form>
</div>

This series of snippets was literally copied and pasted for myself, but feel free to re-use/modify how you see fit. Using this method ( in most cases ) is better if you only need a few options, but really can't see a reason for a bloated library.