Not perfect but I consider this progress
The suction cups on the bottom of the cleaner don't stay put, it slides around, which could be cause for concern in slippage.  I put my toe of the other foot on the pumic stone at the bottom to hold it in place while I clean one foot, then alternate.  At least I'm not standing on one foot in the soapy shower anymore trying to wash my feet my hand.  I consider this progress. *updated review 11/19 - didn't really ever stick to the bottom of the shower so stopped using them after the 5th effort, waste of money*
Rating: 1 stars