I purchased these 3 months ago.  After a couple weeks of wearing them to work, I noticed a sharp pain in my forefoot that would go away if I wear any other shoes I own for a couple days.  I sit behind a desk all day and have a 10 minute walk to the train.  After taking a month off, I'm still unable to wear them for even an hour or two without the pain coming back.  I'm a fit runner and never had this problem with any other shoe.