I was wondering how good MAG is before I pick it up. How does it compare to Modern Warfare? Pros and Cons?

I'm currently renting MAG, and I gotta say that I suck at it. Seems like a game with a lot of potential — massive games, obviously, and team work is expected and rewarded (with extra xp). Lots of people on mic. I haven't had any trouble connecting to games (it's always taken less than two minutes), but I'm not advanced enough yet to have unlocked the modes with 256 players — I've only been playing the 64 and 128 player modes. It could well take longer to get 256 people together. Anyway, I'm not a good judge of the game, and I've never played MW2, but I thought I'd throw in my two cents, having played MAG as recently as this morning.