I like the A324 dual sided (spd cleats on one side, platform on the other). I ride a lot in stop and go city traffic and like being able to switch to platforms at times. I have been clipless for three years now and have never fallen due to the clips. I think a big part of that is that I started out religiously anticipating stops, un-clipping one side and switching to the platform early. My wife took up the 324s last year and has had the same experience as me.