The game's better than MW2 and just as good as CoD4 imo.
This. Also CoD4 and WaW are full of 15 year old hackers that ruin games. You won't have to worry about that here. The problems you will encounter here are the same problems in past CoD games...
but a lot less. There's no Martyrdom, stackable killstreaks, Commando and One Man Army perks, etc. I say keep it. At least for the campaign and zombies.