Don't laugh so much at the guy who said it was unplayable. On 360, there are a lot of issues. Not nearly as bad as most games on launch, like MW2, don't get me wrong; but there's problems, some of them I don't think they can fix because it's part of the style of the game.
It's too easy to overrun in the game; unless you're playing with a specific squad every single time, getting into a game and doing well is rare; I played all day yesterday and got very frustrated several times in games because of many small things, including spawns. Conquest especially, I swear I spawned in front of a tank at least 4 times, when my other teammates were all dead. Some of the maps don't really make sense to me, there's so many people running around different areas it's impossible to get anywhere unless all of your team is talking constantly and communicating, and have a certain area locked down, otherwise it's basically a free for all.
I also notice that like MW2, there's lag when I die. When I get shot, I quickly turn and run around a building, and the game pulls me back around and kills me in a spot 3 feet away. I don't know what really contributes to this, but it's annoying. I'm sure a lot of this plus other things that bother me will wane as the game gets older, hopefully.
I never do bad myself, my aim is good and I try to be smart, but a lot of times you can't help but die over and over again when you literally spawn, and there's a guy in your own base, camping behind a box. It gets so annoying sometimes I just quit, because everybody was out for themselves, and unfortunately nobody I know has the game or plays enough to be in a squad all the time.
It's also difficult for me (on a 52'' LCD) to see people in the wooded areas. It's so thick and the contrast so stark, I get killed long before I ever see them, and there's nothing I can really do if that's the place where I have to go.