it is still in beta. at the moment if you use it, you end up changing both the first and third person skeletons to the same one...which screws up the animations for one of the views (because first and third person uses different animation sets and different skeletons). After you use it, there is no way to undo that change.
scruggs was having trouble with it......but I hope he can get it done soon.
what are you trying to do? maybe there is another way.