I have nothing negitive to say about this shoe, I ran in these for the first time last night and could not beleive the feel of them. I could actuely feel my toes gripping the treadmill. I have had the free runners and the rebock version of the same type of shoe and these put both of those to shame. The fit of the shoe is amazing too, it literally feels like an extension to your foot rather then wearing a shoe. By far these are the best shoes i have ever had, and I can say that after one run.