Good fair reviews. My opinion of the Wii U should be known considering my preferences.
I prefer the xbox one over the ps4 for some odd reason. PS3 was my main console last gen and I'd assume that the PS4 would be the natural replacement. But it hasn't turned out that way as I have taken a better liking to the Xbox One.
If I had to guess, it might be because I find the Xbox Controller more comfortable than the Dualshock 4. Other than that, the PS4 and Xbone are in equal standing in my opinion.
My ratings would be as follows
Wii U: B+
PS4: B-
Xbone: B+