I have worn the KYbun now for a year and a half. I purchased them as I have had foot pain and find it hard to get a shoe that is comfortable. I noticed that my thighs where tight, and because the sales guy told me that I have to work through that, I did.. I stretched the thigh. I have kept walking in the shoes now for a year and a half, but in the past few months have found that my hip and back are very sore. I cannot put on the right sock, and have extreme pain that now radiates from the thigh, to the groin. Doctors are talking hip replacements, my chiropractor thinks we can work through it... but alas, I took off my KYbuns and started wearing asics and brooks running shoes and the pain is subsiding. I feel that the KYbun shoe has failed in the heel and I have been aggravating my hip by not giving up on them. A huge cost for the shoes, but I have spent thousands on my recovery so far.