Black Ops is kind of a dissapointment for me because it's just more of the same stuff that we saw in the other CoD's. Graphics are not bad but they cannot be called good either. The SP is quite long and actually has a story(which is the first time I think xp) and also fun to play, zombies are nice, so far the game was nice. But then I played the MP which was absolutely a step back from the previous games, with very easy and way to powerful killstreaks, overpowered weapons and mappacks that cost 15 euros. The game isn't bad but isn't good either.
BTW I have only played the PS3 version.