Fixing: by spacers fits the holder for different thickness ventilation grille. Important: it must horizontal slats be present, otherwise it is not. That the grid after attachment can not be operated further understood.
The holder is stable, the phone does not wobble. The adjustment with the ball joint works well. The holder is designed for different sizes. I particularly like that the side jaws open with a push of a button, so that the phone is easy to remove.
For me, better than any suction cup: Not in sight, in the grip of the left hand (the holder could be mounted on the left ventilation grid next to the door The mounting makes a sturdy well-made impression..
I have not regretted the purchase and my phone has become such an equivalent Navi spare!