Every now and again you buy a product and it simply does what you expect, and the manufacturers promise.
These dLAN 200 homeplugs are such a product. Not much say except that you plug them in and away they go. Typically you might plug one in to your home (or office) router and then use the others wherever necessary around the home (or office)
Unlike some other stupid homeplugs, there is no pressing a sync button and then running around the home to the other homeplugs within 60 seconds or whatever they say, to press it's sync button too, before they will talk to each other. Only to find the connection lasts a mere few hours, or if your lucky days, before you have to go through the same tedious ritual over again.
I have had mine working for about two months, faultlessly without a break. I have even gone against Devolo's recommendations and plugged one Devolo homeplug in to a 4-way extension sockets, and they still work. I play movies using a media box, without a hitch.
They might be a little bit pricey, but it's a price well worth paying to get good performance and zero config difficulty.