I've used my ALTRA Provision 5s for 5 runs and am very happy with my purchase. I bought the 11.5 based on my experience with other Alta shoes and am very happy with the fit. I was a bit nervous about the sizing as I usually wear a size 12 Nike shoes, but I'm glad I went for the 11.5. The good thing about the fit is that my foot has enough room to breathe and my toes don't cramp. The Nikes I had were narrow in the toe box and on long runs my foot felt compressed. Anyway, I recommend the Provision 5 for runners who love a soft, lightweight shoe with a wide toe.