I gave up on clipless pedals (SPD) a while ago. I only fell once (and that was later, not in the beginning), but I've seen some people fall on rides, but I just didn't like the idea of having my feet attached to the bike. Even on the lowest spring tension setting I wasn't comfortable.

The only time I fell was after climbing a hill, my legs were tired and I didn't unclip in time to stop, I think most falls I've witnessed were caused by stiff legs. I may try clipless again for long out-of-city rides, that's what they good for: long road rides, but for commuting I prefer to stay with platform pedals, I just don't trust myself to unclip quickly enough if I have to stop in traffic. Same for MTB and XC, I prefer platform pedals.

Adam