I'm really into walking. I walk a 5-7  miles/day on hard NYC pavement, and these are by FAR the best sandals I've tried. Truly, it feels like walking on air, and even after recently walking 13.1 miles, I had no foot discomfort whatsoever. Far more expensive sandals, including Naots and Danskos, weren't nearly as good.
These are not the most attractive sandals, but they are so perfect for walking that I don't care. I also have five pairs of the anti-gravity Easy Spirit shoes, which are amazing, too. I'm totally spoiled by the anti-gravity soles and honestly, most other shoes feel uncomfortable now by comparison.