It appears to be of good quality, (much better than the questionable quality - handmade ones made in stores with electricity), but the price is quite high for a simple antenna cable.

Very good cable at a good price. It fixes any problem from the TV device to the wall socket. Obviously, it cannot fix other issues that may exist (antenna, problematic antenna wiring, faulty amplifier, etc.). In my case, where there is likely a problem with the antenna, I still saw an improvement of about 5-10%, which means that when the problem is fixed, this cable will optimize the signal. It appears to be exceptionally well-made, with gold-plated connectors and a larger diameter cable with good protection against electromagnetic interference. It is worth its money, as it is something that does not break or become outdated, so you will keep it for many years.