ClosetGnome is just a handy tool over the Blizzard Equipment Manager. It provides you with a nice LDB display and some funny quips when you change equipment sets, plus it allows you to bind keys directly to equipment sets.
Yes, yes - you can bind your sets with macros and action buttons and stuff already ... But your ClosetGnome will do it with style!
The LDB display addon shown in the screenshots is Blockoland, but of course any LDB display addon will work fine; like NinjaPanel, Fortress, Bazooka, and so forth.
If you wish to request a feature or report a problem, you can use the ticket tracker for ClosetGnome on wowace.com.