My phone went for a walk with the first turn I took. Not to mention that the spring in the clip that holds on to the air vent broke within a week. It's cheap, but normally they should be paying me to use it.

I had to remove one of the two inner pillows from the cushion, otherwise it wouldn't stay in the air vent.

Tragic! For throwing away! Get a branded product to do your job!

Easy to install and mainly easy to use. The phone remains stable. The only negative thing about this type of base is that it needs the car's air vent to be suitable for installation. That means if it has a slope, the base may not be stable. The material used is obviously cheap, but it doesn't seem to cause any problems in usage for now.

It is good, but when I tried it with a magnet base, I left it aside.

However, it does what you want and does not limit you to the 2 devices that these with the magnet limit you, if we are talking about a shared car, here you are

At first glance and upon first touch, it appears to be of very low quality, but with a price as low as a gyro, you don't expect anything crazy. However, it is very convenient, it holds very well on the ventilation grilles, and the phone stays in place and doesn't fall, it is very convenient. Even though you can find it for about 2.5 euros, it would still be worth it as a purchase with 7-10 euros.

UPDATE.5-4-21
Over time, the little clamp that holds onto the vents has become loose, and with the slightest movement, it comes off and falls along with the phone. If you don't plan on removing it, I would say it's better to use a mild adhesive or something similar.