its different. you play it differently to cod, but im enjoying it so far. first time ive strayed from call of duty games since no.3 so its taking a bit of getting used to but graphically its awesome, big choice of weapons to unlock, loads of vehicles (choppers, jet ski's, tanks, boats, hummers, quad bikes etc) can destroy the scenary, buildings etc. sound is a million times better than cod. gun fire etc is unbeleivable at times through surround sound.
only flaws so far, are slight movement issues - seems a bit like lag at times - gives you no sense of what your actually running up (stairs etc) and it seems to take a few more accurate hits to take somene down. thats with basic weapons though so i presume it will be better once you get a few more unlocks.
its a good alternative anyway, until mw2 is sorted.....if that ever happens.