I haven't even touched campaign. I prestiged once or twice but I mainly play tranzit. Zombies is amazing.
Personally, zombies is a meh to me. I feel like they took what they had from BO/WAW and completely changed everything. I don't hate what they did by any means, but I don't find myself in love with zombies like I did in BO or WAW.
The multiplayer is both awesome and awful. I feel like once I start getting into it, everything just flows. But if you don't play with at least one person you know who plays the objectives, it just makes me angry. Not to mention I got a derank glitch that got recovered with a catch - I lost all unlock tokens midways through a prestige and it locked everything up again. It also messed up with my gamestats. Like I have trillions of kills/headshots with certain guns. I also have a gun Weapon Prestige 9 thanks to the glitch. It's so messed up.
If anyone on Xbox wants to hit me up, message me your gamertag.
Tonight I cleared all six of my classes and started fresh... I had 13 unlock tokens, spent them all. As a result, I now have a knife-only class with 6 perks. Why? Because I don't use six classes. I don't even use five. What a waste of a prestige.