Exactly like the other Call of Duty games this one is truly a cinematographic experience. You will feel yourself being part of great movies like "Blackhawk Down". The action is frenetic, screams, bulletfire and explosions are everywhere to put the player in a hig high intensity battle caos. Very good graphic (I liked the powder suspended in the air in Prypiat, it adds the abandoned look to the place). The only drawback is that the SP campign is short, all-scripted and straight-forward (you will not replay it much, it will be always the same).
MP sounds like an evolved version of Counterstrike, nothing even comparable with Armed Assault.