Review (5/5): Wish I had bought one sooner.
I did not expect this tool to be so effective! It does smooth callouses as it claims, though with mine it is going to take several treatments. But, because I moved from a humid area where I had no foot dryness to an extremely dry area, my feet have become scaly. They are rough to the touch and they snag my stockings. Well, not any more. After two treatments with the electric sander, I have gotten rid of the dry skin scales. A little moisturizer and they look great. I need to use this every week or two to maintain the smoothness, but it is kinda fun to do this and feel the difference after a treatment. Note that I have not used any other brands so I can't compare, but I am happy with this one.