Was hoping for quick results
Very easy to use. Wasn't sure if I could close my mouth after applying. Instructions just said no eating or drinking for 20 minutes.  Wasnt sure either if I needed to rinse afterwards.  I had to stop on day 4 because my teeth started to feel a sting. I didn't see much of a change in color. But I only used for four days (morning and at night). I will give it a try again and hopefully make it to day 7.
Rating: 3 stars