I bought it purely out of curiosity.
As a first impression, its price is proportional to its quality. Maybe a few euros lower would have been more reasonable!
It doesn't have anything impressive, it just barely does its job.
Its hasty construction resulted in slight scratches on the plastic that magnifies the screen, creating a slight "dent" when you slide the plastic in to close it. Fortunately, it is not bothersome when viewing.
I wouldn't say it supports 7-inch devices as it claims in its specifications. With a toothpick for reinforcement on the device's base, something can be done because the base it has for the phone struggled to support the Poco x3. As soon as you support the device, it leans back more than the acceptable weight limit of the device, thus changing the viewing angle.
It goes without saying that you have to be straight in order to see well, and of course there is image distortion. It is unreasonable to expect a simple plastic to greatly enhance it.
The dim lights help with the viewing.

For a very makeshift solution, without much hassle, because it seems to break easily, for its price, it might be good.