I've used something similar several years ago. The quality of the Mirrored surface left a lot to be desired, as it was not really feasible to clean and was made of plastic, resulting in the mirrored surface after time deteriorating...
The quality of the image was only suitable for the size you see above any larger and basically it was unusable, i suppose it will find a niche market somewhere.
Gigapan Beta Unit, Canon Powershot S5IS, Canon 350D, Nikon D40, Manfrotto Tripod, BT-Serial + Papywizard on Nokia 770, Fully-Operational Merlin the Wizard Unit!!!