I have to agree with one poster about the sizing.  they do run small.  I had to go up 1/2 size.  but since I bought mine from a store and not online, I was able to walk out with the correct shoes.  I LOVE these shoes!!!  well worth the $100 I paid for them.  I've been wearing them for 2 weeks, and I can already feel and tell a difference in the shape of my behind and my calves.  they've helped with my hip and back pain too (I have rheumatoid arthritis).  I recommend them to all my friends.  my son said they look like orthopedic shoes, and I have to admit, they're not the most attractive pair of shoes I've ever worn, but the benefits far outweigh the asthetics.  I got the all-white ones, and they are more attractive (to me) than some of the others.  I would give them 10 stars if i could.