Yeah I play online. I haven't gotten very far in any of the COD campaigns I've played. I think I got the furthest in MW2.
So far I'm enjoying it. The spawns are a bit ridiculous and campers with snipers, I feel, are more prevalent in this game. I think I was playing on Carrier where the fucker just hid behind boxes on the other side of the map and sniping us, and my teammates, like the fucklets they were, kept going down the same corridor to try and kill him. Didn't help that it kept spawning us in the same damn spot too.
Patches should fix it, but it's been out for a while now.