Ops 2 was a huge failure in my view.  The zombies are fun.  I like the way you can play against the bots with everything unlocked even offline but the multiplayer was horrible.  I'm still working on my 1st prestige because I can't play more than 20 minutes without getting frustrated with the target finders, SMG's with laser pointers and shotguns shooting across the whole damn map.  I'm in 11th round of prestige on MW3 and I think I'll return to that later today.