So did anyone ever say definitively how well the the Keen Commuter cycling sandals did when actually used for cycling?

I love the two pairs of Keens I have, but they're the H2 model--not cycling-specific. I have the Shimano cycling sandals (newer style), and they fit me all right, but the straps are a bit stiff and not as comfy as I could wish. (And my REI dividend is burning a hole in my pocket, too.)

I guess I'm most concerned to hear whether the sole is stiff enough on the Keen Commuters for, say, a 30-40-mile ride.