Didn't get many bugs in my playthrough, or at least any I really remember (even in a funny way, like ME1 when I somehow slid backward through the world during the Matriarch fight). Combat wasn't too bad, for me, when fighting mooks, I wish they'd somehow put the stances in. The boss fights (especially the last one) I wasn't too taken with but it's just a matter of rotations. \
As for it being a good RPG, I had fun playing it and the branching over Act 2 was well done. I'd wait to see how the console port turns out, but recommend the game.