I was recommended by a friend and am really excited the Devolo how well it works. According to the Devolo Cockpit software I have 310Mbit / s connection between the 2 adapters (but distance I can only guess, since I do not know how the cables in the wall just relocated are safe as the 20 meter sure)
Full HD is no longer a problem!
4 stars is because the adapters are already relatively large.