Played this last night with two of my mates, was a disaster at the start had no idea what I was doing and found it very frustrating.
15 mins in and we all loved it, Gears style gameplay and working as team made it ten times more fun. The attention to detail to up grading your weapons is amazing.
Will be looking forward to the single player in this, but I think the MP has real lasting appeal, def one for the mates to get involved, like battle field if you have a good team (and our team are pretty tight) you will love every second of it.