I'd give it a 9/10
Game selection is pretty good, wish it had some more useful apps.
I use it about 30 hours a week between games and Netflix.
Off-TV play is absolutely amazing.
My favourite 10 Wii U games would have to be (In order) Rayman Legends, SM3DW, Lego City Undercover, Lego Marvel SuperHeroes, NBA 2K13, NSMBU, Pikmin 3, Zelda WWHD, ACIV, Deus Ex: Human Revolution. But there are so many other good ones out there.
Predictions! By the end of 2014... PS4: 15 million +, Wii U: 12 million, XOne: 9.5 million!