I can only agree with the previous speakers.
The single player is, as you would in this game series knows again the big screen.
Very good cutscenes and animations.
What it is really only bother that he is quite short as well as in the other parts of this game series.
However, 90% of people buy this game is not for the good single player mode, but because of the multiplayer.
And I had thought at Modern Warfare 2 last year, it is not worse.
Not even close! The game is very bugged.
So the spawn points during the game, for example, set partly directly in front of the opponent's nose.
Good, I thought. Can overlook about it you also.
But what was not funny at all now is the lag and stuttering.
As one goes any enthusiasm.
Conclusion: The developers do business down this game series.
Modern Warfare was a hit, the second part of a disappointment, and now - with Black Ops - a small disaster for the loyal customers.
My personal choice not to buy the next part of the series.