this review title is: stuff really works good use it at night before you go to and the content is: stuff really works good use it at night before you go to bed cause sometimes the charcoal gets stuck between your teeth and is hard to get out but it really whitens and cleans your teeth well i use it once a day and my teeth are amazingly white.there are other information for this review, one is this reviewer did purchase it and the other is 16 people think this review is helpful.