This Review Title is I have pretty good natural teeth and the content is: I have pretty good natural teeth, who just have become less white and lusterous as I age and have periodically drank coffee. After only 1 treatment I can see a difference. I have always had good teeth and this has just boosted the natural health and brilliance of my teeth. I think people just need to be realistic on expectations, this device is not going to correct permanent damage that has occurred, it is just gonna whiten and it has, after one treatment I noticed a difference..There are other information for this review, one is This reviewer did purchase it and the other is 19 people think this review is helpful.