Review (1/5): No positive results after more than 5 days of use!
I used it for more than 5 days, followed all the directions precisely as asked of me in the manual. I saw no improvement in my teeth color. It was very time consuming, the prep was ridiculous. I had better results with strips. I think anybody would be better off having their teeth whitened professionally at a dentist. Whatever you do, don't blow your money on this product!
Hope this helps :)