I bought these because I read that they were a good cross between the Kinvara and Ride. I bought a full size up from my street shoe size. I ran my first marathon in a pair of Saucony, so I knew I needed to allow space for swelling. These bend a little too far forward in the ball of the foot and put pressure on the wrong spot. Any run over 3 miles felt like I had rocks in my shoe. The description of the shoe says they will &#34;bring your mileage to new speeds.&#34; They sure did... by decreasing my pace by two minutes a mile. I wish I had bought the Brooks Glycerins I was debating instead. I wouldn't be dealing with plantar fasciitis in the middle of marathon training. Don't buy these for true long distance running.