A lot of kilometers. Four hikes in various terrains.
The shoe gets more pleasant the more you walk in them. In places with more water this shoe is perfect. It'll keep you dry. The sole offer good grip on slippery rocks. At the lower part there's rubber around which prevent against water and wear. You water proof the leather upper with a special impregnating agent. When you walk I recommend two socks.
It's no problem to get sore on your heels if you don't look up. Always put a bit of tape before you put the shoes on. The shoe could also have better support for the arch of the foot. This is not a shoe for the sky bar, but so what, that's not the thought.