Just want to say, it's TOTALLY WORTH THE PRICE! The zombie map is so much better then the others, it's fun just to search around and use the zipline to get places. I only played a couple of the multiplayer maps and I must admit, it's like a whole new game that plays like Black Ops.
Definitely worth it.
So if your on the fence about this new one, pick it up.
I know me, Hellhammer, Hate, Striker, Reg, Pyro and Asap is getting it tomorrow.