The idea is great: carrying around a light reflector attached to the camera. The images are being done with very successful (after a small groping phase). Unfortunately, the achievement is not up to standard: the clamp that attaches to the ball, break (after a few hours) and from there, it's over, nothing works.
In fact you can use the panel holding the hand but why we do not need to buy this thing; white cardboard been the case (possibly covered with stickers to make it a little irregular).