Getting nice URLs to work in EPiServer CMS 7 with MVC usually means you have to create an ISegment implementation. This extension method makes it a bit tidier.

SegmentRouteCollectionExtensions.cs

using System.Collections.Generic;
using System.Web.Routing;
using EPiServer.Web.Routing;
using EPiServer.Web.Routing.Segments;

namespace Project.Core.Mvc.Routing {
    public static class SegmentRouteCollectionExtensions {
        public static ContentRoute MapContentRouteWithSegments(this RouteCollection routes, string name, string url, object defaults, params ISegment[] segments) {
            return routes.MapContentRouteWithSegments(name, url, defaults, null, segments);
        }

        public static ContentRoute MapContentRouteWithSegments(this RouteCollection routes, string name, string url, object defaults, MapContentRouteParameters parameters, params ISegment[] segments) {
            if (parameters == null)
                parameters = new MapContentRouteParameters();
            
            if (parameters.SegmentMappings == null)
                parameters.SegmentMappings = new Dictionary<string, ISegment>();

            foreach (var segment in segments) {
                parameters.SegmentMappings.Add(segment.Name, segment);
            }

            return routes.MapContentRoute(name, url, defaults, parameters);
        }
    }
}

z RouteConfig.cs

using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using EPiServer.Framework;
using EPiServer.ServiceLocation;
using EPiServer.Framework.Initialization;
using EPiServer.Web.Routing;
using Project.Core.Mvc.Routing;

namespace Project.Web {
    [InitializableModule]
    [ModuleDependency(typeof(ServiceContainerInitialization))]
    public class RouteConfig : IInitializableModule {

        public void RegisterRoutes(RouteCollection routes) {
            
            // example of using the new extension method
            routes.MapContentRouteWithSegments(
                "ProductPage",
                "{language}/{node}/{partial}/{action}/{product}/{page}",
                new { controller = "Product", action = "Index", searchTerms = UrlParameter.Optional },
                new ProductSegment("product"), 
                new PageSegment("page")
            );
            
        }

        public void Initialize(InitializationEngine context) {
            RegisterRoutes(RouteTable.Routes);
        }
        public void Uninitialize(InitializationEngine context) { }
        public void Preload(string[] parameters) { }
    }
}