This Powerline kit we use to connect a computer in the den to the router in the living room. Through several walls the wireless signal was so strongly attenuated that it only faintly reached the computer. In addition, router and computer using an older wireless standard that can not be transmitted in real life the speed of 100 Mbit / s connection by far.
About Ethernet Cable, the pace of internet connection is almost twice as high, but the string can be across the apartment is not properly laid. This Powerline adapter transmitted after all still 35 Mbits / s. In our case, which is sufficient for surfing The decor was very simple, the units are not subject to and do not occupy sockets.