Great shoes! I broke it in by walking around in it for a day. Then the next day I took it out for a 9.6 miles run. On the previous shoes (Mizuno 16 Wave Rider,  which I put in roughly 600 miles before I ordered this one) I would have felt strain on my heels and toes by around mile 7 due to the now wear and tear of that shoes. But this time was great, I did not feel lingering pain on my feet even afterward. Definitely worth the money if you are serious about running. I am hoping this will last me another 500 miles :)