To support themselves, there are small flaws noted. The bracket where the carriage is locked, you must first check how it is unlocked. Sits very tight and you have jitters, cancel something.
Even though it is an A4 sheet with blurred amateur pictures at (-zigste copy) but it is not to recognize the best of intentions, how the mechanics work, especially since no text explanation is present.
Here, the manufacturer has to rectify customer friendly.
With a little skill, I was able to solve the bracket and the slide, suitable for my tablet, pulled out and locked again.
About the functionality there's nothing to complain about, so I 4 stars.