I just got this for the PC a few days ago. It's really good.
Realism has taken a back seat in this latest game in the R6 series and you health has a similar system to halo and the newer COD games where you can't take much damage but if you take a few hits then duck for cover you will completley recover.
Talking of cover the game has a very similar system to Gears of War where you can press the right mouse button at any time and it will 'stick' you to whatever cover you are facing. This will take you to third person view and allow you to either blindly fire you gun over the cover or press a directional button to pop out and aim you gun properly.
The game uses the third incarnation of the Unreal engine (same as GoW) so expect high system requirements but at the same time you can also expect phenomenal visuals.
The physics and sound arn't bad either.
Gameplay and storyline are good (if unbelievable) and overall it's a very cool game.
Note: The game requires a videocard which supports shader model 3.0. Anything in the
mid-high end of the Nvidia 6/7 series should be fine and I believe the 1XXX series of ATI cards support it also. Perhaps even the X850 series.
Note Note: Even if your card does support SM3.0 dont expect to be running this game at high settings with anything less than an 8800 series card. My 7900GTX is having a few problems at 1280x800 with all options on at medium settings.