I got to try it out today. I enjoyed the Rayman game, but I wanted to see how it would preform at its highest capabilities. I will not be getting it, but I admit it was interesting.
i finally got to try it this weekend and Rayman was the only playable demo, so I messed around with that for a while. The level I played was a blast, combining running platforming with a rhythm game set to a really great cover of Black Betty. It was really fun.
The gamepad felt great in my hands; all of the buttons were easily accessible, the screen was sharp and responsive and it felt light, but solid and well-built.
I'll be picking one up eventually, probably in the next year or so after more must-have games are released for it and we have a better feel for the system's longevity.