Best I have found for the price
I purchased this after trying a few other battery operated items. I found this device to be worth the money. The motor will stop if you push too hard but it is properly designed that way so you won't hurt your skin. If it stops you are not using it properly. It is not designed to be a rotary sander.  Callus build up takes a few days to get rid of. It is best to go easy and I found that I had a lot of rough skin due to sports activities and in three days of use and applying a foot cream afterwords my heels were very smooth. I now use it about every three days and am quite pleased with its operation and results.
Rating: 5 stars