I bought a pair of these shoes. They are very comfortable. I wore them every day for about a week. Then my knee (that I had had surgery on) started hurting in a way it had not hurt before. So I stopped wearing the shoes and the pain went away. I thought it was a coincidence. I started to where the shoes again. After about of week of wearing them every day - the same thing happened. I stopped wearing the shoes and the pain went away. I wear them sporadically.  At the most I may wear them 2 days in a row. The pain in my knee has not recurred. The shoes are very comfortable. It is unfortunate that the rocker style aggravates my bad knee.