I have one and myself and the kids are loving it.
We have Nintendoland, ZombiU, Blops2, Mario, Scribblenauts and Sonic on discs and Trine 2 via Download.
All I can say is that blops2 looks better on MP on the Wii U than it does on my ps3.
ZombiU is one of the best games I have ever played as well. Dont play alone in the dark!!