The dimensions of the holder not fit 100% for my main purpose (the Kindle is smaller as the tablet size for the stand was made), this can be resolved quickly but. Since you can fix well innately the Kindle with the two lower brackets already, you need a stable "over-head mounting" only a Schuhsenkel, or better - a Velcro strap. The Kindle can be positioned so directly above your head without that you get heavy arms from holding longer (and as I said - devices fit in tablet size and maintain even without this trick).
The stand is stable and looks solid work. Also, the flexible part does not act as if the bending function could be restricted soon.
Conclusion:
Anyone who wants to have to keep his tablet or its e-reader even without it by hand to read (and a screw terminal solution for the point of use is unsuitable) can access here carefree. ==> A quality product at a fair price