Review (5/5): As useful as all the reviews indicate
I bought this product because my heels become very rough in the winter. The dry skin was catching on my socks and sheets and annoying me. I had tried a manual file, but that was totally ineffective. This product is easy to charge and use. It holds it's charge for at least 40 minutes. I used the foot file on dry feet every day for 4 days and now am using it once a week as a maintenance routine. It is gently run back and forth over the skin to grind away the dead skin. There is no discomfort. There is quite a bit of foot dandruff created. Follow with some moisturizer and put your socks on! Voila!