I'm not a "real" runner... yet, anyway! But I have a goal of running a 1/2 marathon (even if it's just me, and not a race) this year. I got these shoes and after my first run in them, noticed that my right knee, which would usually hurt for at least the first half mile (had an injury years ago) had no pain at all. Neither did my ankles or anything else. They are so light, comfortable, and have even helped my form. The width in the toes and the nice tight arches feel great. These shoes are so awesome that I have been running more because of them. On only the third time wearing them, I ran twice the distance I have ever done outdoors, at my best pace since my high school lacrosse days (and I'm 31). As fast as I do on a treadmill on zero incline, but outside up and down hills and in the mud! I do wear them with socks, though (balega) because it is really cold out.