I've seen and read about some problems with the AI. Is it really bad? I've seen some video of the AI doing really stupid things (of course, they weren't too bright in BF:BC2 either).

I'm tempted to pick this game up, but since it's really just a SP game it's going to have to be a lot better than the SP portion of games like BF and CoD.

Nothing that I've noticed yet but I've fought a lot more monsters than humans so far. The humans I did fight fought from behind cover as did the friendly AI going with me at that part.

I didn't notice anything that made me say "Hey that was cool" but I didn't ntoice anything that broke the immersion or atmosphere (which the game has in spades) either.