Started playing it last night and as i expected i really love this game,the first hour is completely new and none of that content was in the closed or open beta.
Only played for about 90 minutes and only at level 4 but i know that i am going to spend a lot of time with this game as its one of those games you just can not wait to play.
I like the fact that you can change the difficulty when doing different missions and call in other people to help you co/op style.
Put a few missions on hard and called for help and i have to say they are one hell of a challenge .