Kind of really late on this game but I just started playing it and it's pretty sweet! I know it got good reviews when it came out but I just never had a chance to play. I think the main reason I put it off so long was the demo I tried way back when. It didn't seem like anything to special.
I'm not too far into it but it's a lot of fun. The atmosphere is crazy. I started it on hard and the necromorphs are putting up a decent fight to say the least. Can't wait to finish and buy Dead Space 2.