Excellent product, does just what it says it will. My teeth were much whiter after just a few sessions. After the first session the light that came with it stopped emitting beeps when the timer ran out. I emailed them and they immediately sent a replacement which works fine.

I've tried three different 3Pks within the last month and NONE of them have whitened my teeth at all. I've tried using it for a week at 1 hour and another week at 2 hours ... no change in color. For the record I have a slight yellow shade to my teeth.

Ordered this for my granddaughter as she is a makeup artist. She is going into this field after graduation this year. She loves this airbrush makeup machine. This was a good choice.