I'm only using them indoors, but I love them. Only been spinning about a year, but these are a perfect fit for my feet even though I usually buy wide shoes. I use SPD-SL 'cause I like the float, and these handle them just fine. Feet don't slide around in them, don't sweat much--if at all, and are easy to put on and take off. I'm sure there are some hardcore spinners/cyclists out there who can find a host of issues with these, but these are great for the price and what I use them for.
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