I have those exact pedals, with Shimano shoes. I used them for 3 years and finally switched back to toe clips just for simplicity. Honestly, I don't see what the big deal is. I guess my form must suck or something, but they don't do anything for me that toe clips don't do. I'm not paying any real attention to my styles or efficiency or anything, I'm just friggin' going to work and back again.
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Work: the 8 hours that separates bike rides.