I may try SPD's soon. I still have the PD-1050 (old Shimano 105 group) with toe clips and straps which were original on my bike. I like them, and they work for me, with no mishaps. However, after reading some reviews, it seems clipless pedals really do help your efficiency, and obviously that helps a lot, especially as you get older. If I got to ride longer with less fatigue that would be very welcome.