Bought one of these a week or so ago and have to say am very impressed - so much better feeling in the hand compared to using the gamepad.
The gamepad is great for games that utilise it properly - zombiu / Zelda wind waker HD etc that use the screen properly but for most games it is poo
Had my pro controller for over a week and been using it every day - it is still almost fully charged - they tout an 80 hour battery life which I can believe - it has rumble etc but it is a little on the light side
80 Hours? Sony et al need to take a look in