I purchased these shoes to wear in the house.  I have sacroillitis, 2 compressed discs and a pinched nerve in my sacrum which causes severe leg pain.  I cannot stand, sit or walk for long periods of time.  I wanted something that would work my muscles without causing additional pain.  These shoes fit the bill!

Unlike other reviewers who had problems with 'motion', I did not experience this problem.  The first day I wore them in one-hour intervals; I am now wearing them full time.  For me, it does feel like muscles have been worked, or in my case, "awakened", but the level of soreness is minimal.  You WILL stand up straight and for me it is effortless (I have horribly bad posture).  I have had to deal with excrutiating pain in my left heel; these shoes have eliminated that pain.  In fact, for me, it is like walking on air.

I also found the shoe true to size. The only problems I have experienced is that whilst my foot fits in the shoe perfectly, without socks, my heels want to lift out.  They do come rather stiff; need to be worked a little to soften them up.

I am not expecting to lose any weight (or cellulite as they claim) walking in these shoes.  But I like them so very much, I not only ordered myself a different style of shape-ups, I have also ordered a pair for my husband who has severe arthritis in his knee.  I'm hoping these will give him relief.