With regard to the processing of making the two adapter a good impression. I can over the long term durability of the adapter of course too early to say much, but gives the manufacturer 3 year warranty. Should there be weaknesses or defects, so there is spare.
The installation was a breeze: Both adapters plugged into the wall sockets on two different levels, and hold the Pair button and a few seconds later the connection was there. I have the software provided so far not yet installed (seems to be unnecessary). To use multiple Internet-enabled devices connect (TV, Blu-ray player), I have a switch connected to the Powerline adapter. Again, this works without problems.
The Entertain receiver immediately finds the signal and TV (also in HD) is working properly. I do not see any interference or delays compared to before when I was still using a direct cable connection.
In summary, I am very satisfied and have an inexpensive and easy way to find Internet connections, in this case for IP-TV, to be used on several floors.