I bought a pair of Birkenstock Arizonas some months back, and have worn them pretty much every day, all day, since then. Now that that are worn in, they are among the most comfortable shoes I have ever worn. I was somewhat skeptical as to the sizing, as I find there is a great deal of variance in manfacturer's sizing (Adidas 12, Clarks 10, Dr Martens ? (worn off the tongue). Still, I found a perfect fit, and have been well pleased with them since. Would definitely recommend anyone to splash out and buy some, and as and when mine give up the ghost, will happily buy another pair - but given the way they are wearing, I don't imagine that will come for a year or five yet.