As already mentioned, you have to buy half a size larger. Had 4 runs so far and the outsole seems pretty fun. I just hope it's time to get used to it. Feels very spongy, almost unstable. It's like stepping on s'mores. Edit #1: I ran 6 miles at an average pace and the shoes felt a lot better. Maybe he needs the right pace and the right shots. Rating upgrade to 4 stars.