I personally like the new Zombies. I've been able to build almost everything and get some hidden things like permanent perks and Galvaknuckles. Also the bank and the refrigerator are pretty cool. If you don't know you can save your money and store up to about 250k on or offline and use it any time you start up zombies. The refrigerator is used for storing one weapon for later use and can be accessed at any time. Down side is you die with it and its gone and you can't put in sniper rifles (who cares anyway) or the ray gun. Packed weapons can be placed in here though. You can also teleport using the green lights after the power is turned on by bringing an alien under it and he burrows to get away so you can use the same tunnel. At first I wasn't really impressed but they did add a ton and I think its pretty cool.