I've not bought the game yet.
But I come on here everyday and also check Steam to see if a new patch has come out that fixed a large amount of the bugs. Not going to buy this game for full retail when I read all these problems. I pre-ordered Bioshock 2 and swore to never pre-order a game again, because they all have bugs that ruin the fun/experience.
Especially, when I know Steam is going to have holiday sales for other games soon.
I have yet thought "Damn I regret buying this buggy pile of junk". No, much to the contrary, I've been thoroughly amazed at it. IT was certainly worth the 50 bucks I spent and I'd call it best game of 2010 if not best game of the decade. Sure I've hit a couple of bugs, but eh, it's par for the course. Nothing severely gamebreaking.