Review (4/5): Very powerful, but awkward to use.
Much more powerful that battery driven units, however, sanding head is too small and the rotation direction (like a electric screwdriver) causes unit to skip off the skin and is difficult, if not impossible, to maintain constant pressure. Also, because of the "L" shaped design of the unit, it is impossible to shave the outside of your feet unless you are a contortionist or have Gibbon arms. You can't see what you're doing and you can't do it by feel since the unit skips off the skin. This product would be perfect if it had been designed with a rotating barrel head like the Amope (which was not powerful enough). Nevertheless, since I could not find a plug in unit with a rotating barrel, I have no choice but to keep it and use it. If you're concerned about power, don't be. I made by feet bleed a bit on the first try.