Got it yesterday and I love it. Granted I was knee deep into some Heinekens but I had a blast. I really like some of the changes they made to multiplayer (like the little preview of where you're going to spawn). Didn't really play the maps enough times to really judge them properly but I like the verticality of them. Also, snipers are really going to earn their kills. In this game if I get sniped I don't get mad like in COD, because there really isn't any quickscoping. Not only do you have to adjust for wind, but now you'll have to manually adjust for distance.
I've found that the UI is a bit confusing, especially when trying to switch classes. Just not as intuitive as it was in the past, but I suppose I'll get used to it.
Played about 4 hours of the campaign before I hit multiplayer and it was pretty tight also. Lots of "oh poo" moments.