I have these and they are way stiff. I feel like Frankenstein when I wear these, very bulky. I know these are free running shoes but I couldn't see actually running in these things. I use them as approach shoes for climbing and they are ok for that. The issue I have with these is I was on a big wall rappelling in the afternoon and the temp got over 94 deg. The front of the shoes became unglued and now are totally de-laminated. The glue needs a higher melting point as the sole is not stitched in the front.