Just bought my third wifi Devolo Power Plug yesterday, to connect to the fourth Power Plug unit, connected to the Airport Express.
Signal in the garden is now splendid. Good stuff, these Devolo Power Plugs.
IINM, Michael does use one (er, at least two of course) too.
Three years guarantee, where do you find that nowadays?
No, I do not have stakes in either Devolo or CafeTran LLC.