I have found some glitches though. On the very first level where you're in the submarine, when you help the soldier open the hatch and watch the other marines pass through it, Alcatraz phases through a grate and the bars appear on your screen terminator 2 style.
On the semper fi or die level there are numerous shadow glitches especially on grassy patch areas and the grass itself seems to bug out. I found some grass floating on thin air and some of the the ground beneath it seemed to stretch inward into some kind of crater.
Overall I'm very happy with it and it definately looks amazing now, but I can't help but be picky with these glitches and bugs when I've waited so long for it. Sorry Crytek :\