I like the ability to have draggable and sortable lists via acts-as-list in Hobo, but I needed more:
I had a hierarchical structure, like a category tree, that needed to be sortable. I wanted a drag and drop interface. Furthermore the updates should be immediate via Ajax. Because this can take a while for huge trees, the user should be informed clearly, but unobtrusively, when update started, when update suceeded and when it failed.
I found Hobo to be compatible with the Ancestry gem and it plays nicely with Nestable.js and Messenger.js and it doesn't break the Bootstrap look and feel too much.