I purchased a pair of the MBT Shoes called the MBT Sport White. When I received them, I was a bit thrown back on how weird they looked. They looked clunky and huge. I put them on and was instantly feeling weird. They rock back and forth, due to the curved sole. But after a few minutes of wearing these MBT's, I became use to the weird motion and began to walk around. They actually felt really good. Walking felt better from some reason. As you walk, the shoe actually propels you in a correct fashion. When standing still, you feel more upright and my back felt more straight.