this review title is: usb charging only and the content is: got this thinking it would work better than brushing and flossing i would say it is about the same it is small so it would be convenient to bring with you on travels if you prefer over standard brushing i am not thrilled with the usb only charging option i want to be able to plug it in a standard outlet without having to get another adapter the water tank only lasts about a minute would prefer longer but of course that would increase the size of the product.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.