http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2012/05/16/national/w080045D23.DTL&tsp=1
I had a pair of these. Turns out they're hell to wear if your Achilles' tendons are a bit stiff. Getting physio and ortho insoles as a result of what those shoes did wasn't fun, but my tendons are in much better shape now than they were before I bought them. I'm not interested in a refund, though; someone else inherited the shoes and quite liked them, and my legs are in better condition as an indirect result of said shoes.