I've been wearing Asics Gel-Kayano for decades and decided to give them a try. Wow! They were noticeably smoother and the motion control I needed was exceptional too. He has a redesigned truss, perhaps this change has increased comfort. However, I haven't tried the latest version of the Kayano (20) so I'm not sure if the level of comfort in this shoe is comparable, but I'm very happy with this new shoe!