pros:

good multiplayer

wager match was a really good idea

Co-OP is really good.theres no such thing as fighting zombies in the pentagon with JFK and Castro.

Creative stryline in campaign. They put every part of the cold war in the mission.(vietnam, Soviets, Bay of Pigs, and the assasination of JFK)

Cons:

graphics kinda sucks. MW 2 graphics were better

They still cant solve the camping issue in multiplayer. Multiplayer mpas filled with places to camp

Takes forever to connect to a game

same old perks from MW2. i thought they coulda added new perks

All in all if u like playing zombies then buy Black ops otherwise just stick to MW or MW2.personally i like playing zombies and i dont really care abt multiplayer