I'm not sure since I haven't purchased a pair...
I was looking into them for my wife as she's standing all day long and he coworkers swore by them as being really comfortable.
The sales pitch is that they tone your body and help with posture. I didn't hear this from my wife's coworkers but I can see how they could help with posture. I'm not sure how they would help with toning though.
At $300, the investment is pretty high for me. I'm curious about the reebok and sketchers versions at ~$100 but I haven't been able to try the shoes out in person yet.
Height: 5'9'', Couch to 5k Graduate x 2 (Oct 08 & Jun 09)
SW 280 (Starting Weight - March 2008)
| current weight: 199.6