Got it on PC, so far I'm happy with it, I've been searching for a "clan/group/community" to game with lately, as mine doesn't take any interest in Black Ops and it's some what on the low activity right now.
Campaign was really well done, LOVED it, kept me engaged all the way through, veteran though to be honest was ridiculous... on MW2 Veteran difficulty was enjoyable and still playable. Black ops Veteran is just terrible in my opinion, way to hard. I miss spec ops, and team match making, but I love Dedi servers, new weapons, kill streaks, it's very fun
It's pretty nice, although I've always preferred Infinity Ward's games over Treyarch ones. I've only started playing through the campaign on veteran, so I'm saving multiplayer for last. (Probably around when my Xbox forum opens up.)