When I started, I did not, although my mom has. She uses my old look delta pedals.

I have fallen recently because of them, although I don't blame them. In a 100 mile MTB race, midway through the day I had jumped off to cross a rocky dry river bed, when I got back on and went to pedal, my legs instantly crapped up right after I clipped in. I fell like a log, but got a good laugh out of it. That was one long day. 100 mile mtb race is much harder then 100 mile road race.