I've been playing this game on ranger hardcore for the better half of the night. Without any HUD and at a very hard difficulty, this game is truly immersive. Several times I'd jump half out of my chair when I'd go around a corner. Not having a HUD is annoying in that you have absolutely no idea how much ammo you have unless you have the Bastard that shows the ammo. I pulled out my sniper rifle only to find out I had one single bullet when there were two enemies. On a side note: I lost that confrontation
As far as performance goes, the sli profile hasn't been released so I'm stuck with a single gtx 680 with a 3770k @ 5ghz and I'm pulling 40-45 fps on normal settings on 5970x1080 with tessellation set to normal. I've never experienced any of those weird crashes that the reviewer experienced but this game looks beautiful even at moderate settings. I can't wait until nvidia releases the sli profile so I can crank this to highest settings.