I tried it out at Atia last month. It actually worked quite well and seems to require less range of motion and less constant recalibration than either the Tracker Pro or head Mouse extreme or Nano. It seems a little more user friendly then the Quha Zono. On the flip side the Bluetooth connection can timeout and the guys who make it have no understanding of their audience. I would definitely have concerns about a return policy that only accepts returns if it's broken.
I am probably going to buy one for our Clinic because of the ease of use, the fact that it's wireless, and the price point.
Lisa