I wanted to like this product, as I have been using Crest whitening products for years, and I have always been pleased. To my disappointment, this product fell way beyond my standards.
For the step one treatment, the flavor was great. However, the aftertaste left nothing but a stale taste in my mouth, something one certainly does not want from a toothpaste.
As for the step two, I have been using for about two weeks no and have seen little to no whitening in my teeth.
I will continue to purchase the Advanced Vivid white strips and use a regular whitening toothpaste.