This is one of my favorite games from 07. However, it has got to be the second buggiest POS in 2007 coming close to Crysis. Thats why I opted to play the 360 version, same great experience, no hassles. I got no farther than the first encounter with a Big Daddy on the PC version.
It wasn't even about the hardware, although lots of people will tell you to get better hardware if you have all kinds of problems. tsk tsk.