Did a 20 miler yesterday with a hill at the end. The first part started out flat and the Keens felt fine. I could feel them flex a bit in the arch as I was climbing the hill, though. It felt like there was something in the shoe that kept the front part - toe to about the front third of my arch - really stiff, but it seems to end there.

I still really like them but I think I'll just keep using them for shorter casual rides and bike errands.