Stumbled over a bump and moved down no matter how hard you tightened the screw (tightened almost to the point where the screw snapped off). I used a Garmin Edge 830 and a GoPro Hero 7 Black and spent a whopping 30 miles reconfiguring them after each hit. Garmin didn't fare much better after each hit. I think you get what you pay for. I would not recommend that.