I thought it seemed like a pretty decent game as I played through it, albeit not as great as I had heard. Found myself underwhelmed by as many things as were great, but it was well worth playing through... I thought, until I encountered what might be the worst bug I've encountered in a game.
First of all, I played on XBOX, so this might not affect players on PC. What happened was that I first noticed that the 'save game' option was grayed out. I continued, only noticing much later that it hadn't changed. I tried to load the latest auto save to see if it would fix things, but couldn't access my saves. Finally I decided to take the hit and restarted the game. The game then crashed every single time I tried to get to the main menu. I reinstalled the game, was able to start it again, only to find that the game now crashed when I tried to load a save, any save. I guess they had all somehow become corrupted.
I'm a completionist and explorer. I lost over 40 hours invested in the game. A bug like that should be unacceptable at launch, not to mention for a game that has been out for half a year.