As a new runner, I decided to check out an actual running shoe. I had bought cross-trainers for years and decided to see what the difference was. Well, folks, there is a difference. A big difference. I spent a lot of time trying on all sorts of shoes. My feet are on the wide side and I have very high arches. The size is accurate- the 8 1/2 was perfect, even with my wider foot. They hug my foot so well, do not slip, and are very comfortable! These are so light, and the cushioning is fabulous- they put a spring in my step when I run! Love the bright colors too. Now, I need to "stock up" because I don't want to have found something that works so well for me and then find it "gone" when I need another pair. Highly recommended!