When you wear these shoes, they do feel good.  I did run into a problem that caused an injury.  When I wear these shoes, my toes feel like they are being forced apart.  I injured the metatarsal bones on the top of my foot on a casual run and have been down for about 6 weeks.  An MRI showed that a stress fracture occurred between 2 of the bones due to the separation of the toes.  While I love the shoes, I will be going back to the Mizuno Wave Universe 4 running shoes.