I ride with the SPD M324 so that I can ride with and without cycling specific shoes. Most rides are clipless because I can keep a good cadence without slipping however, I will ride on the platform if I am uncertain of the oncoming traffic or going down or up a long hill. If a friend wants to ride on of my bikes, he/she doesn't need to change shoes. I fell off my bike once last year while clipped in only because I blacked out. Other than that, I feel confident using them.