I used ethernet over power myself for several years when I rented a house, and it worked well for me. Recently, a friend was having wifi trouble (old house, thick plaster faraday cage walls). I suggested ethernet over power, and it worked great with one exception:

They have Sonos speakers, and Sonos just would not work with it. They apparently are very sensitive to latency. The ping times were roughly 50ms (from memory) between the 2 ethernet over power adapters.. I guess Sonos takes synchronization quite seriously.