Firstly its perhaps as good as very expensive VST units & I really like it a Lot !
Sadly like the rest of your iOS products (I have them all & love them all) they are fidgety with Audiobus at even all current versions ... You have to relaunch "sometimes" several times in Audiobus to get a good connection ... It got Worse with this update . . .
Specs: iPad 4 128 wifi iOS 6.1.3
AshFallenBrightly about AudioReverb