Basically it's the comfort as you walk that stops you always getting a shooting pain in your heel every time you take a step. That's definitely special. You feel good in them, and it's very pleasant in these shoes. If my feet sweat, then my feet don't feel wet in these shoes any more. It's also very smooth and balanced as you roll through a step.
At first I wasn't at all sure whether the kyBoot would do me any good. But after that I started to like the warmth the shoes give me, and the feeling that walking is different. All in all, I can say that the shoes do me good. I couldn't say what it is exactly that the kyBoot shoes do to me, but I have to keep on wearing them or my muscles start aching again.