I rode SPDs with black cleats for about 2-3 months. DO NOT RIDE THEM BRAKELESS! I unclipped 3 or 4 times from skipping and a few other times just from sprinting really hard from a stop. After my last unclip on a steep downhill narrow windy campus road with a car coming the opposite way and having to do the jamaican skid I ordered Time ATAC aliums. No accidental unclips in 7 months.

These Times I have had to service several times tho and the free play setting being a plastic dustcap on the end is really imprecise and cheesy. Makes me want to buy a better model, but still, no unclips.