The Wii U version is fine. I had the game hard crash once, requiring a hard reset of the console. I was flipping back and forth between a couple of menus while GHTV was trying to show me and load some stuff. But that's it, and I don't see that happening again.
You'll want to make sure you have 2GB free so the game can store cache data for GHTV, but even that is not required.
Cool, thank you. Did you happen to grab a two pack? I read about some connection issues. Have you tried the mic as well?