Very handy and useful item to be used for websites with a very large menu. The backend however still becomes quite laggy with a lot of menu items even with this plugin. But it did help organize and maintain the 500 items better.
Lifesaver. We have a large shop with over 200 categories, 100+ of which are in the excellent UberMenu (same guys). Without this plugin I'd have blown my brains out at my desk. Fast as F@*k support, too :) Cheers!