Racing with the Flow.
I use the Cloud Flow to Race 10km to Half Marathon and have had a great experience with them. Light, Fast and no Foot problems afterwards. Structure of the shoe is Supportive and they are comfortable with no pressure points on the feet.
I only race in On Shoes since a couple of years and have improved my results. I also train in CloudRush or CloudSurfer.
Great shoes.The best I have had.