I played two Co-Op missions with a friend, and three multiplayer matches. Essentially what this game is to me is SOCOM+Gears of War blended together. It's definitely a good game based on what I've played, but could potentially be terrible if you don't play with a group of friends. I'm trying to convince a few of them to get this game so we have a full squad.
So far, I'd give it about a 9/10 ... we'll see though.