While the brush is suitable for ages five and up, it's fair to say that it would probably be overkill for most people, for whom a standard manual or electric toothbrush will likely do the job. Where the GlareSmile could really be useful is for children, disabled users, and the elderly, who either haven't learned proper brushing technique, or have decreased mobility in their hands.
The device charges via USB as standard, but there's also a solar charger available as an optional extra. The heads can be changed, just like a standard electric toothbrush, meaning that one unit can be used by several people, and the company is offering a charging dock with spaces to hold those extra heads. It also keeps track of brushing time, the amount of pressure applied and more, with all that data viewable through a companion app, or by plugging the toothbrush into a PC.