It did what I bought it for. Useful with its easy source switching button and automatic recognition.

As for the cons, which may be important for some:
When you change the selected source or turn off the screen it is connected to, it stops sending the signal to the other devices, or simply put, if you are on a different source and the non-selected one is a PC, it is as if it is not connected to a screen (not like it is turned off).

The result of this is that if you have, for example, a PC connected to it and you want to access it through remote desktop, it simply cannot be done.

In the 3rd month, it started to freeze on the signal of one source, resulting in having to disconnect it to switch to the other. I guess you get what you pay for.

Very bad product. It displays horizontal lines in many cases.
Now, after three months of use, it completely broke and only accepts one input.
Also, it often got stuck and didn't change.
Do not buy it.

Timely delivery / Careful packaging / As advertised. I have it for two computers with one monitor. However, be aware that both systems need to be open simultaneously, otherwise it doesn't always synchronize.

Quite good, I didn't notice any difference in the image quality.
I connected it to a 24" TV/Monitor and I placed 2 laptops and the PS4 on it.
The good thing is that it recognizes the new signal. So, if I'm working on the laptop and I turn on the PS4, it automatically switches to the PS4. Also, if you have 2 connected sources, it doesn't cycle through all the positions with the button, it just goes directly to the next one with a signal.
The downside, however, is that when everything is closed, somehow the screen detects a signal every few seconds, causing it not to go into rest mode.

Update 01/2021
Unfortunately, from the first month, interruptions started without me forcing it anywhere. Its cable doesn't make good contact, and as soon as the desk moves a little, the colors get messed up or the screen turns off. You have to turn it around to see where it will catch. It's annoying and it keeps getting worse...

I tried it on two televisions (Samsung 50" 4K HDR UE50NU7022KXXH Smart TV and LG 32LH2010) and it didn't work...

Sturdy construction, thick HDMI cable that shows quality. The switch is superb and quite cheap. I don't have a 4K TV (so it wasn't tested) but I tried it with a laptop, MPEG4, and PS4. Additionally, the output was successfully passed through an HDMI-to-VGA adapter.

Note: the PS4 CANNOT "play" on its own on the switch due to the fact that the PS4 itself does not output enough power and the switch does not have an external power supply. It requires at least one more active device to be connected to the switch (e.g. MPEG4 decoder).