Two years ago my left foot began to turn in and I ended up in a boot to correct the problem.  Having been used to wearing orthodics in my every day shoes, I longed for a running shoe that would give my feet the stability I needed.  I came across the Brooks Ariel and I am so glad I did.  This shoe is perfect for me.  My feet are stable during high impact Attack class.  I can move sideways, jump and run and my feet do not feel like they are turning in. And my feet are not as tired and sore as when I worked out in other brands.  This shoe is a great shoe and I highly recommend it.