I have the Keen commuter sandals and love 'em, commuting or mountain biking.

- They are narrower compared to my regular walking Keens, that's good IMHO. They are not walking sandals, the narrower last keeps my feet in place, esp when twisting out of SPD pedals. If they were as wide as my walking Keens, they'd be too sloppy and it'll be real hard to twist out of the clipless pedals, not good when mountain biking or commuting.

- I like to ride off road and IMHO, the heavy duty toe cap is needed.