Originally I feel in love with this boot because it felt like I was walking on pillows.  However, after the first day of wearing it and lots of walking, my heel became sore from the rubbing against the back of the boot.  It was only my right heel so maybe it was a defect in just that boot or it could be from the fact that the inside boot near the heel is ONLY CARDBOARD.  No material covers that part of the boot.  For $150...I was very disappointed so the boot had to go back.  Maybe if I gave it time to break-in I would have had more luck but my heel would not have forgiven me for waiting days/weeks for breaking-in.  The sales person suggested I try a larger size but after I saw the cardboard, I was done with this boot.