I was happy to find these shoes in a 10.5 which is rare.  Very comfy and great if you do a lot of walking, I got these just for work.  You feel a "rocking sensation" when you're on the move.  I feel a little tenderness in my calves and ankles.  Not sure if they are actually helping me burn more calories, but after about 3 weeks of wearing them, I could say my ankles are stronger (which is good because I recently had an ankle injury).  I like how they look in comparison to the Sketcher shape-ups, not as bulky and look more stylish.  (FYI: If you ever climb stairs in these, you will definitely feel it!) Like I said before, I can't tell if these shoes actually help with weight loss, but for comfort purposes...they are wonderful.  Give them a try.  My friends love them too.