At first, it kept disconnecting, and when it managed to stay connected, parasites appeared on the screen.

I connected it to an old TV that worked with a scart to digital receiver and it made a huge difference. I haven't tried it on any 4k resolution computer to give you my opinion, but as far as regular TV is concerned, it works perfectly.

It was tested on a 1080p, 60Hz signal and occasionally on 10 Bit. It never lost the signal, but it was expected due to the length and the 1080p resolution. It has not been tested on 4K. Great value for money at this price.