Pedal orientation could be a concern if you have a lot of stop and start. I just went to the garage and checked three bikes that have the A520s. All pedals were hanging vertically in the proper position for clipping in but I don't know if this would be the case while actually riding. My guess is that it may take awhile for them to settle. I ride mostly on rural roads and only have to clip/unclip every 15-20 miles. I agree that if you ride short distances or have lots of stop/start, the double sided pedals may make more sense. I rode the MXXX type happily for years and only switched when I increased my mileage substantially.