I have just fitted my new dual SPD/flat Shimano pedals. One one side is a normal flat pedal and on the other an SPD binding. Great for touring or when you don’t want to/cannot wear cycling shoes. I’ll review them in due course. I mainly bought them because I have been getting paranoid that my cleats are not properly adjusted. They don’t hurt my knees when I cycle but I have acquired a click in my right knee when I walk upstairs. I shall do a weeks commute without the SPD’s to see if the twinges stop. I’m not sure if the clicking could resolve itself in that time. Probably not, but it will put my mind at rest.