I bought my second pair of these I liked the first so much.  Great fit for a narrow foot, cool and breathable for summer walking.  I walk four miles a day in these (to and from work) and they are very comfy.  THey don't have a lot of structure, so they conform well to your foot.  I could imagine running in them, if I get back into that (ran a lot before kids).  Only problem is that sole is thin, and heavy use is wearing it through, that's why I got another pair.  But I think that is going to happen any time you have such a thin sole.