The holder makes a solid impression, the click mechanism works and the smartphone can be as described in the instructions rotate well. On my first 100km tour I had in any case no problems with it and never the impression that the construction would not hold.
One point deduction, there still. On longer tours a smartphone without an external power supply is relatively meaningless. Therefore, it should also have the corresponding recess for a cable as a mobile phone holder. Well, the instructions of this model while suggesting this possibility - for an iPhone because its relatively flat plug fails. Any other smartphones account shall be left out. Even with a comparable flat, angled MicroUSB cable for non-Apple devices can not connect with my N4 sheath. So you do not want to do without the external power supply, you would have to take a smaller device (in length) - but then the problem comes with the curvature of the film and probably in general to the non-permanent seat of the smartphone in the holder. This point, the manufacturer has probably not really thought through.