i am on the fence if the concept is better than a more standard shoe. i ordered the newer ones because i am a natural mid foot striker that lands on the outside half of my foot. @ 45+ miles/week traditional shoes wear out quickly. i am now waiting to see if the lugs will last longer than standard shoes (adidas w/ continental rubber.) They have to right??  if no difference between the 4 or 5 lugs i will probable buy a few pair of 4 lugs...<br />i have been looking for a critical/negative review online & can only find glowing reviews. i am missing something.