The perfect shoe has finally been invented!!! If you want a shoe that you can run 30 miles, scramble up class 5 rocks, run on slippery trails, and still love, this is the shoe for you. I cannot believe how comfortable it is, while still maintaining a good stiffness for climbing and rebound. I can run buffed out smooth single track just as comfortably in these as I can run on rocks and boulders all day. The only shoe that equals this one is the Dynafit Ultra. I have run in the Saucony Peregrine's for years, and finally FINALLY found a shoe that gets everything right that I was always disappointed with in other shoes. I've run almost 300 miles in these, and they are still in great condition with good tread and solid upper. No other shoes have ever lasted this well for so long.