Beautiful graphics, really cool, addictive MP action.
I've been playing it since the day it came out for PC, and am still not sick of it. I only play on tactical servers though. Not into the rng thing, and like to play search and destroy as a team, against another team playing as a team. Too many of the CoD 4 servers out there have people running just willy-nilly, shooting up everything, totally disorganized.
I was kind of disappointed in the single player, though, but not surprised. It had a cool storyline, and what there was of it, was very cool, but it wasn't enough. It seems games these days which offer MP tend to skimp on the SP version. I really like long games like Half-Life 2, and wish there were more of them out there like it.
But I can't stop playing CoD 4 multiplayer once I start. Three thumbs up.