I am not sure why someone would give these shoes a bad review. Maybe they bought a size too small... These shoes are absolutely fantastic! Not to mention they look amazing but when I put them on for the first run I improved my 5km run time by more than a minute! They are super comfortable, light and the support on the heel feels fantastic. All in all a great buy! If you are looking to improve your running times this is the shoe for you. They make you want to run faster! Thanks Nike!