I had terrible plantar fasciitis. I did PT, wore New Balance shoes with inserts, nothing helped. I had to put my feet up by 3 every day. Getting up with the baby in the night was torture it hurt so bad. I read about Birkenstocks, and got a pair of Londons for daily wear and sandals for getting out of bed and knocking around the house. The guy who owned the shop I went to had some degree in feet. He was amazing, and told me never to go without shoes until the pain was completely gone. I had been living barefoot or in flip flops, or cheap flats, so I did myself in. I am happy to say that I am completely healed. I can wear any shoe now for a few hours, no problem, but I always want to put those Birks back on, they feel so good on my feet. They are pricey, but surgery or PT is way more expensive!