Review title is USB Charging Only [SEP] Got this thinking it would work better than brushing and flossing; I would say it's about the same. It's 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.