Been playing the campaign, it's pretty good. but after playing just two days (and they were short sessions i might add), i'm already half way through the game. I've read reviews that people are complaining about the short campaign. Most people say they can finish it in 6-10 hrs which is pretty sure indeed. Although 90% of the people who buy these FPS games buy it for the online play anyways so meh, i guess campaigns have taken a backseat to online gameplay.
it's kinda neat because like previous battlefield installments, there's more to play than just the FPS view. You get to fly planes, tanks and shoot off the top of Humvees. some of these are available in online play as well.. it's pretty cool...
anyways, it's roughly an A,A,10,10,J on high and 2,3,4,6,8 on low for chicago high-low... pretty good, but not 4 raise 4 raise 4 raise 4 awesome...