I have tried using this product twice and NEVER again. It makes my teeth so sensitive that it hurts to breath. The air is too cold. And OMG the pain. It is not worth it. They whiten a bit nut not enough to make the terrible pain worthwhile....

This product is easy to use and results are noticeable by the end of the treatment period, they are a little pricey so I`m not sure I would purchase again but the product does work

The result is great, however after just using it once, my teeth became incredibly sensitive to absolutely everything. SO conclusion is that I would not buy them again.. And buy Aquafina trays!