In my view, the biggest problem with this type of holders of the large distance of the camera to the terminal point. This creates a long lever, which favors a swing of the camera. On the mountain bike camera catches already when driving on rough asphalt to swing. And I had installed only one of the two joints in the test. When driving over cobblestones wiggling the camera so much that you could barely see anything in the video. What this means in the terrain you can imagine. In my opinion, not to be used at the MTB and probably also in all other vibration-intensive sports rather unsuitable.
