the campaign is ok but misses depth but the biggest issue is the online gameplay. If you can manage to get a game without the connection being lost all the time you will soon find out that 80% of the time you'll be killed by someone who you cannot see yet when you view the kill cam they are stood infront of you. Now i'll admit my internet isnt amazing BUT I have read other reviews from people with fibre and they havce the same issue. the game does a poor job of matchmating yourself with other players with equal skill.
My final point is if you have played MW3 youll be very aware that there where alot of people cheating with autoaim bots. this ruined the game and unfortunatly this is already evident on black-ops 2.
If you happen to find 42.99 in the road and have nothing better to spend it on then get this game but if your not in that sutuation thing twice :)