This Review Title is Honest review: so this stuff works- I can tell ... and the content is: Honest review: so this stuff works- I can tell you that much. BUT I think it only works for surface stains ( from coffee, wine and other drinks). I did see a noticeable difference after the first use. Brush gently with a SOFT toothbrush. I made the mistake of using a medium toothbrush the first time and I destroyed my gums..There are other information for this review, one is This reviewer did not purchase it and the other is 0 people think this review is helpful.