I bought it specifically for this year's Rock 'n' Roll Half Marathon. As many reviews say, they are fast, responsive and comfortable. So far I've used them to run three 5k and a halfs and I've felt they all worked very well. They are a bit small, I usually have a 10.5 in most shoes, but I went for 11 on these and they fit just right. As mentioned in some reviews, the cushioning is also quite stiff due to the curvature. Support, but that's exactly why this shoe is so cool, because it keeps you moving and adapting to your shape. Definitely recommended for that specific reason, apart from the sense of security that the BOA system provides and the added coolness factor!