Several issues. I found Orthaheel over a year ago and only wear those shoes. Been noticing a slip in quality lately...though their prices remain high. They have a much too limited style/color choice. One of the pairs I've been wearing for a long time seems not to be holding up. The shoes they make with no backs are not the best choice for ppl w/foot troubles - why else would you buy these shoes? I'm now looking for a brand that I can use my slip in orthotics with because I'm sick  of paying the high prices and having such limited choices. That said, they helped enormously with my PF which was becoming a real problem.