The slope between the suction cup and the holder eigentlichem unfortunately can only be set in halftone steps. One way to turn I did not, but you can still move the tablet intake vertically. The image is suitable for devices from approximately 6 cm to 20 cm. This should be enough horizontally or vertically for all models.
The bracket itself makes me a good, albeit chunky impression.
Conclusion:
They served their purpose and ensures a secure fit.