Best iphone holders of its kind

I have tried almost all holders, also waterproof.
This one does not want to be waterproof, and the question I ask myself is whether one really needs. Rain and navigation do not come together often before, and if it's possible to put the iPhone in your pocket. The disadvantages of waterproof are namely significantly, ranging from poor operability of the keys, the unreliable operation of the films which are not always really a touch screen, etc.
Having said that you can in this holder saying that it retains full control and readability of the iPhone that all three neuralgic connections are working properly: the fixation of the iPhone in the holder, doubly secured by the attractive red tape, the connection of the retaining plate the clamp, which is done by the ball head and the clamp on the handlebar, which is done by reliable screw connection and not through but widespread lack of ratchet straps that and either "by ratcheting" at the beginning or after a short time and thereby provoke the loss of the iPhone make the whole thing useless.
One sees here at every detail that competent engineers were at work here, and not only product designers.