After having been a runner for over 20 years and going through pretty much all of the storied "running shoe brands" out there I have to acknowledge these Kinsei 4's as the best in terms of quality, comfort and durability. I purchased them sight unseen from Amazon June 7th 2012 and have used them at about 120 miles per month and they are still in great shape which is amazing. I usually change shoes every 500 treadmill miles or so but have found no need so far even though its been more than 900 miles. Suffice to say my next pair will be Asics Kinsei's again...in whatever iteration they happen to be. Excellent product!