I have wide feet and wear Keen shoes almost exclusively.  They make a few products that fit narrower than their normal product, but these have the Keen traditional fit.  For wide feet, order your normal size.  If you have normal feet, order down a half size or get one of the other Keen bike shoes as they all have a narrower fit.  I ordered up a half size just to make sure there was room for thicker socks in the winter.  There was really no need, as they are nice and roomy.  They are just a little bit wide in the heel, but I have duck feet.  Once I am clipped into my pedals, there is no slippage at all.  My feet have plenty of room to expand when they get hot.

Unlike my other bike shoes, I never get any numb spots or hot spots while riding.  I really love these bike shoes.