Used once on short trip. Mounted to Yakama crossbar fairly easily, but one mounting nut jammed and seized when trying to remove. Will need to cut off u-bolt and replace. The nut went on easily and was not cross threaded during installation. It appears to have seized due to cross loading forces on bracket. Also, u-bolt slightly wider than plastic bracket mounting holes, which requires force to insert or remove u-bolt causing the bolt threads to scour into the plastic bracket which won't last long at this rate. Not a good design if intended for temporary installation.