Yesterday actually, I'm posting this today because I was too busy playing it. To those of you who are still deciding: It is by far the best CoD(well, for now at least. We'll see how the glitches go) and the campaign was by far the best shooter campaign. That is not including BioShock, which is more RPG/FPS. You may not believe it, but the story was incredible. It was kinda like military 24 with a touch of BioShock, if I were to describe it.
Multiplayer(So far) seems to take all of the good from both MW2 and WaW and make the(again, so far) perfect CoD. Zombies is also back and better that ever. Its President Kennedy, Nixon, and Castro vs. Zombies! With a very humorous intro movie.

PS
I find it hilarious that the critics are giving Black Ops lower ratings than MW2.
I also find it hilarious how much the users ar hating on it, some dont even own it. Idiots.