I ride a lot, sometimes over 300 miles in a single week. These shoes have been really comfortable (my feet are a bit narrow, as are the shoes). The fit is perfect. The problem is the heel. After about 3 months with the shoes, I shaved the heel off when I missed clipping into the pedal. I took them back and Giro sent me new ones! Awesome! I then shaved the heel off again. The shoe design problem (versus my clipping in problem that happens on really long rides) is the abrupt rise of the heel pad on the sole. If you catch it just right, the heel pads shave off and are not replaceable. You need new shoes. Giro truly was awesome to replace them the first time around, and may even again.. but I am opting to try a different shoe with a more gradual heel pad rise (and some shoes have replaceable heel pads, which is even better).