Got it last Sunday and already racked up 17+ hours on multiplayer. I'm up to level 34 (rank: Major). I guess it goes without saying, but the game is absolutely awesome. My only complaint is that it's a bit too easy to kill in multi-player. This is my first CoD game, and I'm still used to the MOHAA mechanics. Anyway, my kill:death ratio is 1910:1713 so far. It's pretty pathetic, I know, but I'm steadily getting better. I love completing the challenges and decking out my inventory. That has got to be the best addition to online shooters ever. Oh yeah, and 'martyrdom' rocks.