Act 3 suffers from poor FPS, but it's playable. I haven't encountered any super serious bugs. I do feel like Acts 1 and 2 were a lot more fun, but I kind of knew I probably wasn't going to care about being in Baldur's Gate that much. I feel like the environments and events in Acts 1 and 2 were much more exotic and interesting. The city of Baldur's Gate unfortunately on the other hand doesn't feel very special or exciting. But I may also have play fatigue setting in since I've been playing so much already. Act 3 also feels especially easy - like nothing is at all seriously challenging me even on tactician difficulty, my party is just far too strong for anything the game is throwing at me. It does kind of suck to hit the level cap a long time before the content is done, but I got a mod that will let you keep getting XP for multiclassing. I have that and might use it to do a dip level for my characters, but they're already too strong.