I purchased this product with the hope that it would help my knees as I do a lot of walking and standing at work., and this product rocks!! My back feels better and my knees and feet no longer hurt when I get home after a 12hr shift.  I would recommend this product for those who need a softer sole, I can not attest to the weight loss or toning as I have not noticed any benefit from this aspect of the shoe.  I do know that I will continue to use these sneakers at work and other co-workers have also purchased these shoes for the benefit to their knees and feet.