Really took 1 ride, though I did fall as I stopped and forgot to unclip. At the Hotter than Hell 100 in Wichita Falls TX back in 1992. the large crowd on the 100k started moving then stopped, the guy next to me didn't unclip and BAM!! down he went taking out 2 others. Not the best place to learn to use them
Currently I have 2 bikes with SPD's and 1 with Time RXS pedals