I'm using Aztech 500mbps Homeplugs for my HyppTV and they work very well. Basically just plug n play. No probs for 4yrs plus. My house is single phase electricity.

Also tried Homeplugs at my uncle's house which is 3-phase. It didn't work there. The Homeplugs connected but throughput was too slow. I guess the socket were on different phases.

For his house, we're now testing a couple of Mikrotik routers configured as a wifi bridge. Just did it today and it's working but will need to test it for a bit for reliability. The STB is on a different floor about 40-50ft away from the router. It's a much more expensive solution than Homeplugs.