I have road tested the Nimbus 10 and they are an improvement on Nimbus 9. Superior cushioning all round. You will notice the thicker heal. Runner’s World recommends them for mid-weight runners, but it’s probably a good trainer for heavier runners or those who require additional cushioning. The curved shape of the laces helps fit. I tend to rip the heal out of shoes, but this has not happened since Nimbus 8. The fit is as good as Nimbus 9. Asics knows they have a loyal following for this shoe, hence the additional hike in price.