These shoes have a toe box that is so small it kills my toes.  It squishes them and is so small it pushes down on one of my toe nails.  I walked around the house for a few min and thought they were great, then I walked from my car into work and I could tell right away the day would be shoe hell.  I don't think going from an 8M to an 8.5M would do anything.  I got a million compliments on them, but they hurt so bad I didn't care.