Super grip even in Downhill

I bought the mount for my mountain bike and was just not sure if they can hold the S5 bumpy slopes properly. But since the smartphone precisely located in the bracket and the rubber additionally provides support, in my opinion, nothing can happen. The ball joint allows for infinite adjustment (if hochtkant or cross). I have the bracket mounted directly on the handlebar and even after rough singletrack and a few jumps, the S5 is properly seated. Although it is possibly a little wet and dirty because no shell protects the smartphone, but what else do you need a waterproof cell phone? ;)
BUY recommendation even for downhill. Thank you!