It is connected to the output of my PC at the end of a cable 15 meters (15 euros on amazon) and the picture is perfect in HD on the TV, the perfect sound. It is not even necessary to feed as it is able to use the 5V present on the HDMI cable.
It is better to buy this product and take a low-end cable. It will work much better than a very expensive single cable.
The case is metal, it feels solid and professional.