This shoe is exceedingly comfortable and doesn't bother my knees, back or feet when I walk any distance. I was originally going to return them as my heel kept slipping out (I have a narrow instep and even narrower heel) but then Orthofeet sent me heel grips, told me to put in both extra inserts provided, and the problem seems to be solved. This shoe provides a wide, comfortable toe box and you can fasten them as tight as you wish to fit your width. They are more stylish than they look in the picture and you will be able to leave your tennis shoes at home. The customer service is wonderful. Now I just have to figure out how to water proof them for a trip to a rainy climate.