Is this game worth it? I'll be a little late to the party.
It's an awkward combination of BLOPS and MW3. You can't camp like BLOPS because there are 65 ways to get to every point on the map and there is always the possibility that the other team is spawning 10 feet behind you and shooting you in the ass. Not to mention you don't unlock ghost until level 50 something so you're always exposed.
Running and gunning seems more difficult to me as well because there are windows everywhere you can get picked off from and the shear number of corners and alleys your have to traverse make it complicated. Not to mention there is always the possibility that the other team is spawning in the corner/alley you just passed and will shoot you in the ass.
This is all for hardcore as thats all I play