These are now £54.99 again rather than £49.99 but I still think they are second to none for what they offer.
They are the cheapest on the Internet.
They have streamed HD content from my NAS drive to the PS3 without one glitch since I got them.
They prioritise your data through QOS - Quality of Service so that Video streams without any glitches.
Plug these into the wall socket and then plug whatever you want into it.
This means that you do not lose the use of a socket.
You still need to connect this with an Ethernet cable to your router as usual.
Compatible with other home-plugs.