BEST THING I EVER DID FOR MY GROOMING NEEDS
I purchased this because I have been having some shoulder problems and filing aggravated it.  I am on my feet a lot so I build up bad calluses.  I have never found something that works as well as the hype.  This does.  I had to move up to the green files for my heels but my feet have never been smoother.  With the summer here I wear my sandals proudly.  It has plenty of power as long as the file is the correct one for your needs.  The file that came with it laughed at my calluses and that is the only reason I gave it 4 stars.
Rating: 4 stars