My wife has the Keen SPD sandals and likes them a lot, they are for sure more narrow than the regular Keens. When I ride platforms with my regular Keens they are wider than the pedals and the heels easily strike the chainstay. I live in my Keen (regular) sandals in the summer but IMO they are not good cycling shoes.

I use the old Lake 2 strap SPD sandals for warm weather commutes and like them at lot.

Not to hijack the thread but I'm wondering if anyone has a long term review of the new Lakes sandals? They look a lot like the Keens, but since they come from a company that only makes cycling products they are certainly worth consideration.

http://www.lakecycling.com/io-sdl-p-117.html