First this is a shoe for the heavy weights, heel strikers. I am 6'2" and push around 210 lbs.  I have high arch but I put in an arch support. The various sizes and widths of this shoes has all the features and characteristics a serious runner needs. I run 25-30 miles per week regularly. This shoe lasts about 350-400 miles before the shock absorbtion declines. I am quite satisfied with the performance of the Brooks Beast. I ran 10 milers and half marathon races in these shoes. I slow down now after about 20+years and I still will not depart from The BEAST. I have not had any major injuries to my knees and ankles. I highly recommend this shoe but remember if you are serious about running you must know to change your shoe at the end of its expected life so you may not damage your body.