When building up my new tandem, my wife (not a "cyclist") wondered why I insisted on clipless pedals. She didn't like getting in and out and said they hurt her knees. I bought the Shimanos with platform on one side and clipless on the other to satisfy her. Before we had gone half a mile on our first ride with her on the platforms, she learned why I like the clipless when she lost the pedals. We went directly home. I also put pedal extenders on and she has no more knee pain, can clip in and out easily and never uses the platform side. Not saying what is right for everyone else, just reporting our experience.