I purchased Skechers Shape Ups to help with a recent knee injury.  Because of the comfortableness I have since purchased two more pairs.  These are the most comfortable shoes I've worn to date and, at 57 years old, I've worn a lot of shoes.  They're a bit hard to adjust to at first but after an hour or two you truly feel as if you're walking on firm sand.  I workout on a regular basis so I can't gauge the toning aspect but can tell you that my rock climbing has improved as has my balance.  I would recommend this shoe to anyone who enjoys the feeling of comfort.