Review title is Useless product [SEP] Useless product. &#34;Most Powerful&#34; as claimed ? I think not,  The motor & battery combo in this thing is so weak that as soon as I touch it to the skin of my foot, it stops moving. To get it to rotate at all, I have to touch it so gently to my skin that all it does is tickle... any harder contact than that, and it just stops.