You have to make sure that it matches the cooling air grid at all. It does not work, for example, when the grating is sunk. Generally, such holder may not work if the air flows out hot air because the device in the holder can then overheat.
The holder is rotatable in small steps, so that it can come to sloping or star-shaped bars are used.
Since the holder is just a simple clamp, consists of a vertically mounted smartphones, so horizontal mounting of the holder, the risk that the device from slipping out during strong vibrations. For normal drives, the smartphone sits but strong enough and does not slip out, because both sides of the bracket have a rubber coating.
The processing was not too good in my device. I had to scrape some glue, which had probably run out when sticking the rubber layers. The function was thus not disturbed.
