I found them to be absolutely magical!
I suffered debilitating foot pain from about age 11. Went to docs, got orthopaedic shoes, the whole works - no help.
When I was 15, and the Earth Shoes were 'cool', I talked my folks into buying me a pair. After a few days getting used to them, my foot pain was GONE. 100%. They were also the most durable shoes I've ever owned - wore the same pair daily for about 6 years. When they finally wore out, the company had gone out of business so I couldn't get another pair.
Flash forward about another 15 years - I ruptured a disc in my back, and suffered chronic back pain for about 8-10 years. Some time around 2001-2002, I read that the Earth Shoes were being re-introduced, and I bought a new pair. My back pain was 90% gone within a week or so.
A few years later, when I tried to buy another pair, I discovered that they had discontinued Men's styles, and were making the shoes for women only. My wife located two pair of Men's style in my size NOS at an online warehouse and bought them for me. I can't wear them at work, but wear them when I can.
I'm a believer!