Rating: 4 / 5
I have a pair of these, the leather, not the H2 model. I wear then all the time. Every day. They have a lifetime warranty, so if you can break them, keen will replace them.
As far as hiking goes, I took them of the SHT for a 4 day trip this past June. They were really nice and freeing, but not much lateral support, as with any sandal. But no blisters and my feet were very comfortable.
My favorite thing to do with them is canoe. I take them in the boundary waters. They are great for wet portages and jumping in and out of the canoe, because I wear a pair of smartwool socks with them, so my feet stay warm, even when wet.
The worst thing is that it is very easy to get rocks inside them, which is a pain and the main reason I don't use them much outside canoing and everyday travel.