I had some NB MW559WN that I put over 2000 miles on before they wore out. Although I haven't walked in the shoes yet, I expect to get the same comfortable results. Personally they were expensive, but worth it in my opinion. In fact, I bought two pair for myself. I am 63 years old, 6 foot tall, 165 lbs, and wear a 10D shoe size. When you get the shoes, snug up the laces with your foot at the back of the shoe. Start with the laces closest to the toes and work your way up to the top. Make sure that your heel is firmly in the back of the shoe. If your heel slips use the top holes in the shoe. These shoes are designed for FAST PACE WALKER! If you are just going to causal stroll down the street, these are not for you. JC ...After thought, I've walked 15 miles in them now, and they are just starting to conform to my foot and feel comfortable.