It's definitely a stylish dungeon. It just sticks out between our wilderness grove and our renaissance/steampunk metropolis. I was just a victim of my own expectations, I was expecting a less linear outing after the first act, with our party wending our way to BG. We essentially just got a much more extensive version of the shadow temple from BG2. I in no way hate Act II, I just didn't like how it told its story, I guess.
Oh, and the monastary map is probably the highlight of the whole game for me.