It was a great shoe to start with, but the upper was not well made and the problems started almost immediately. The mesh that makes up the lower portion of the upper was clearly not up to usual New Balance standards (I almost always run 300+ miles in NB shoes). Already after 290 km the mesh on the inside of my left foot started to tear, which significantly reduced the wearing comfort of the shoe and made it almost unusable. Really disappointing for a $130 shoe.