The bass response is the real failure here. Some feel heavier and slower, and some feel incredibly nimble. I see that as totally acceptable for the use/abuse I was putting them through and the price point. When going to put on these shoes, I quickly realized it wasnt going to happen. And because of the heat and that they are a bit tight fitting - they dont allow my feet to stay as cool as with the Duet Sports. 1 of the 4 bottom steel brackets has a nut that is positionally off location and interferes with the bar on the vehicle, preventing it from properly securing. Foundation of the story seems to sound. Im not a hardware savvy type of person, so I just picked out two of the longer screws from each package and used those. When I first tried these headphones, I gotta say I was disappointed. The sole is very nice.