I was very skeptical with these. I just didn't think they could have the support I need without more straps. I had even tried the VIA BARR because it is cute with the gold buckles but couldn't get the straps tight enough to stop my pronating. When I put these on, the front strap was actually a little low and tight. I put in for a return, then looked at all the great reviews and decided to hang on for a few days. The front strap has stretched enough to be comfortable but not let my feet slop  around. I assumed the rear strap was useless but realized it was in the exact spot to make the shoe hug my arch.  No heel pain and not much protest from my big toe injury.  I am starting to think Fitflop is beating out the orthopedic shoe technology and looking good while doing it.  Really looking forward to being able to wear sandals instead of sneakers with insoles all summer. For those between sizes  I did stick with size 8.  9 would have been too big. Hope that is helpful to others between sizes.  PS: The return is not happening.