So first off I want to say that I'm only an hour or so into the game, so I'm by no means as well acquainted with it as some others. But I thought I would mention a few bugs I've run into (my specs are that of the recommended, save for my harddrive being only 12GB):
1) Running the game on Vulkan just did not work, at all. Game would immediately crash after hitting play, tried troubleshooting it and no matter what I did it would still crash. Switching to Direct worked.
2) Sound cuts in and out with seemingly no cause, this is particularly prevalent in combat, with music cutting out randomly and the only sound being that of spellcasting.
3) Lag. Just lag.
4) PC will sometimes not move immediately/continuously, clicking on the same spot for a few moments seems to bypass this. (Might have to do with lag?)
5) Sometimes a character will speak, but there is no facial movement.
6) Characters sometimes slide around during cutscenes.
7) Exiting the game caused what I can only call a "rave" affect on my PC, with all open windows flashing for about a minute until I force quit steam.
But honestly despite the bugs I'm really happy with this game so far. I can tell that Larian put a lot of love into it, and I'm happy they decided to go with early access so that 1) I can play the game sooner, and 2) they can work out all the kinks and bumps. I'm eager to really sink my teeth into it!