Yep, big thumbs up for Devolo plugs from me.
I know two people who have ditched wireless after getting fed up with it dropping out etc and have been delighted with these devices. I got a pair for my Dad and they were so easy to setup and haven't had any problems at all. I just wished they had been around a few years ago, when I went through the hassle of wiring a 30m Ethernet cable from my hall, up the stairs and across the landing.
Apart from being slightly expensive they rule. I cannot understand why more people don't use them. I would recommend over wireless every time, unless you really do want to be surfing the net in the garden!