I had an N spec router downstairs which gave me a signal throughout the house, and out into the garden, but my problem was that the router couldn't move plus neither could my main PC upstairs - so unfortunately I was stuck with a weaker signal in the room I needed it most!
Then I saw these little beauties!
It really is as easy as it sounds, connect the modem to one plug, then pop into the mains. At the computer, connect to the other plug and then into the mains. Press the 'sync' button on one plug, do the same on the other, and within a minute the plugs have synced and you have a rapid connection (as fast as your incoming broadband is!).
I decided to go from the tp plug - router - pc just to give me a wee bit of extra security (with the router firewall) and also keep my wireless signal available if needed. A direct ethernet connection from the router to the pc of course keeps the speed as high as possible.
As far as my computer goes, and home entertainment etc, this is by far the best use of 35 quid !!
Now I know I can add more of these wherever I want them about the house and it will all just 'work'.