My husband says these are the most comfortable shoes he's ever worn.  He has terrible pain from  a heel spur and no matter what he's tried in the past, whether it be an expensive sports shoe, orthodics or even shots of cortisone in his heel, nothing relieved the pain.  He took a gamble and ordered the Spira Wavewalkers.  He's so glad he did.  His pain level went from a 10 to a 2.  The shoes were worth every penny.