Review (1/5): Poor quality. No support
The product itself seems to work well but not for long. Mine lasted exactly 3.5 sessions (fourteen 8 minute whitening cycles) before it stopped working and will not charge. The manufacturer displayed absolutely no interest in attempting to rectify the situation or replace the defective product. I received my kit in a raffle from my dentist and so at least I am not out of pocket.
If you are interested in whitening your teeth, I recommend researching to find a more reliable manufacturer with a better track record of customer support.