I finished the game:
- SP was a rush. And a fast one too, I beat the game under 6 hours on Regular. It was fun, and intense. Maybe a bit too intense.
- Spec Ops is fun. But that's it. Nothing more, nothing less.
- Multiplayer (on PC) so far sucks ass. It's laggy all the time, and it's almost exactly the same as CoD4, with the addition of some new weapons.
Overall, it's good, but not really worth the money. Better wait for games like Assassins Creed 2, Battlefield: Bad Company 2, or L4D2. *irony, all of them have "2" in it*