I only played 4 missions so far, and I must say the third one was pretty cool because it was the most "calm" one. With that said, I think there's wayyy too much stuff happening at the same time in this single player campaign. I know COD games are known for being cinematic and stuff, but this one is just too extreme (so far)! First you're having a fight with someone, then there's people everywhere beating people up, then you get out and you're being bombarded by a turret, then helicopters and explosions everywhere, then you get a chain gun and explode everything, and then a motorcycle ride and then you get on a truck and destroy helicopters and more trucks and FINALLY you have to jump on a train! I mean WTF just happened?
You can't really take your breath with this game. And I don't even want to think how some parts are going to be atrociously hard on Veteran difficulty. This is no Modern Warfare 2 that's for sure!
Overall, I'd recommend it if you're in the mood to play CoD games. If not, well go play a few of the old ones to get in the beat because this one starts really really fast!