I use this programm to animate.
And I can do great smooth anim with it; imo (see my avatar)
And it has bug but easily avoidable in fact there is 1 bug it's when your reopn a alrdy opened model in the programm it duplicate attachement,collision shape,event and pivot point.
And it's way better than warshape since you have a modifialble perspective view and not imposed +X/Y, -X/Y, X/-Y etc...