I'm a nurse in a busy department, on my feet at least 12 hours straight at work, on concrete floors.  I've bought big-name nursing/medical shoes that cost more than these and had to take them off after an hour or two.  Clogs never fit right. Athletic shoes were usually ok for the first 5-6 hours, but after that they were killing me.  I saw these in a store just over 2 years ago and thought a sole that thick had to be packing some serious padding. The price seemed steep for Spice Girl-looking tennis shoes, at just over $100 (they were still pretty new and I didn't know they were supposed to magically lift your butt and ban your cellulite.) Still, I'd paid more for work shoes that got donated to Goodwill after two hours of wear.  They fit sitting down and the store was packed, so I bought them without a test drive and held on to the receipt. When I first put them on at home, I felt like I was going to topple over or fall backwards; it was like learning how to walk all over again.  They felt awkward the first couple days, and my knees and ankles ached a little at first--probably from the initial extra effort of balancing on an unfamiliar surface. I thought I might have made a mistake and wasted my money. But after three shifts in them, they felt completely natural and I didn't have to think about how to walk in them.  I also had absolutely no pain in my feet.  None.  For the first time ever.  Once they were broken in, they were the most comfortable shoes I've ever worn--all because of that crazy-looking sole.  When the balls of my feet start to get tired, I just rock back onto the heel, completely taking my weight off the ball of my foot (and getting a bonus calf-stretch). The back of the shoe keeps you balanced, so you can stay that way for as long as you have time to stand in one spot.  Vice versa if my heels are sore, I roll forward toward the front of the shoe and give my heels a break--without ever having to sit down.  Alternating back and forth like that rests your feet while you're still on them.  Who knew?  Now that Amazon has them a little cheaper, I'm ordering a second pair in all black--which is what I would have gotten the first time, but these were the only black ones in the store.

BOTTOM LINE: If you're buying these expecting a new butt in a box, save some money and just get a reality check instead.  If a shoe could give you a great figure, we'd all own those shoes and a perfect bod.  If you're looking for something that lets you stay on your feet without killing your feet--this is the only thing I've found.  I've worn mine 12+ hours a night, non-stop, 3-4 nights a week at work--plus 30-45 minutes a day on the treadmill, and they still look almost new after 2+ years (with reasonable care). If you're willing to feel wobbly and weird for a couple days and adjust to them, they're worth every penny in comfort and durability.  I give 4 instead of 5 stars only because I think they're overpriced based on their claim to help shed pounds, knowing people will pay anything for the promise of weight loss.