I have been running in Boston 6, 7 and 8 for the past 4 years. For me, the Boston 9 is the best of the bunch. The fit is perfect for my narrow feet. The flex point is at the correct place for my foot and I am able to run faster in the Boston 9 than the Boston 9. I will be getting 2 more pairs in the coming months. The bright yellow colour is just fine. The cushioning is just right and so is the responsiveness. Traction is good on roads. Great for tempo run and distance interval repeats. Great job Adidas.