I bought these in May.  Loved the style and the fit. They were truly the most comfortable sneakers I have ever bought - plus the workout benefits.  Mostly I could feel extra burn when I walked a lot during the day - but especially when I walked a lot of stairs.  I wore them for about 2 weeks to work and around town.  Then made the mistake of working out in them.  They warn you not to run or do extensive exercise - they are for walking.  And they are right.  I promptly broke my 4th metatarsal on my left foot while running on the treadmill. I have never had any foot injuries or broken bones before so I was pretty surprised! Despite that, I still love them and if I had worn them for walking only I would have been OK.  Hopefully I will get to use them again someday!