Absolutly increadible shoes, I have had them about 6 mounts now and I love them. I work on a concrete floor about 9 hours per day. I have rheumatoid arthritis  and my feet stopped hurting especially in the mornings as soon as I started wearing these shoes... The grooves on the bottoms of the soles are still in amazing condition and the whole shoes is holding up well although my feet are starting to hurt in the mornings again so I am about to purchase another pair because I cant visably see it but I feel as if they are starting to flatting out but the way they make my feet feel I think that spending $120 ever 6 months is worth it.