This extension has just gotten better and better. It is especially helpful if you are visual. It makes seeing your menus, modules, and module positions very easy. You can easily see what is assigned to a page. You can move things around by dragging (both menus and modules). Unpublished menus and modules are visible too if you want to see them. I am running this on 3.2.1 and on the latest 2.5. It works well in both.