I now have four pairs of running shoes. I have my Newtons, my Brooks Adrenaline, the Saloman Trail Shoes, and a new pair of Pearl Izumi Streaks. I am hoping that the PI will replace the Newtons and that the Newtons will become training only. While I like the Newtons they are expensive and I have flat, fat feet and have even been told by Newton that their shoes were not made for my feet.