So far it looks pretty decent, I’ve had no issues with the controller, but overscan seems to be a problem.
I have it hooked up to a 720p TV but it insists on outputting 1080p, resulting in about an inch being cut off each edge. Their suggestions to fix this have been largely ineffectual (turning on overscan in the settings does nothing).
There also just aren’t very many intriguing games yet, but I was able to side-load two of my own projects and they worked well. While I can’t get the USB debugging drivers to work right on my PC, side-loading can be accomplished by downloading .apk’s through the web browser and installing them from the Settings > Storage menu.
I liked Dub Wars, but it’s in Beta and only has the one playable level without purchase.