Just my personal opinion/situation....if you've ever suffered the incredible misery of plantar fasciitis, which I've had in both heels, at different times....and took 5 yrs and 2 years to resolve (non-surgically)....I would never even think of jeopardizing my heels trying these....I'll stick with my Keens.
p.s...I think I saw pbkid (Jack) wearing these in Moab....think he said he loved them.