Seems like a much cheaper way to train than to have to replace a pair of running shoes ever 500 miles.
“I get no blisters, just some light chaffing on the top of my big toe where the sandal strap is. My feet stay dry and the shoes dry off quickly. Including this race, I’ve run 2,700 miles in just this pair," said Greg Anderson.
https://www.runnersworld.com/runners-stories/a28422524/vol-state-teva-sandal-wearing-winner/