I've worn the Supernova models for 15 years at this point as a runner, and I did wear these out just like I do all my Supernovas, but the glue they're using to hold them together is not as good as previous models and the sole also didn't seem as durable- I feel like these were toast after only 200 miles or so instead of my normal runners' rule of 300-500 miles per shoe. Was glad when model switch for the next year happened.