I had back pain, and on top of that my left leg is 2.5 cm too short. I'd tried almost everything. It's a congenital defect. At first I wore MBT shoes. I thought they were the best there is, but I couldn't walk in them. Even the specialists said I couldn't walk in them. I looked a bit further afield and came across the kyBoot. Thanks to someone working at the chemist's, ho let me take the shoes home straight away, I was able to try the shoes out. I wasn't convinced immediately; it felt strange and they "wobbled about” a bit. She actually said that my muscles might ache, but I didn't get that during the trial period, only later. After I'd got over the whole thing, I have to say that they're really great. No more cold feet. We already have three pairs and I'm getting another pair soon.
It's really comfortable. Like on a cushion.