Sonic Glow tooth brusher (Greenwood/Phinney Ridge)

This is a new, in-the-packaging, Sonic Glow Teeth Ultra-Sonic toothbrush. I was sent this by mistake as I tried to order something else. This happened twice so I have 2 of these. I tried one, this is the other one. It works but I have no way of knowing if it is more or less effective than just brushing. You don't "brush", you put it in your mouth and it vibrates. I did a little research and it seems these are not a scam, it is a legitimate device that has an effect, but claims about it being superior to regular brushing are not borne out by evidence.