I've got three in my house for my PC and the family PC. Works a treat. They shouldn't affect the speeds of each other. Obviously if the two PCs were maxed out there's only so much the one at the router end can take, if that makes sense?Probably best to turn them off when not in use, whether or not it was just bad luck or faulty anyway, mine burnt out.
I use them and they are good for surfing but no use if you wanted to stream a HD movie
As long as you have one homeplug connected to your router, you just need 1 for each PC you want to connect, and you can have as many as you like iirc.
Worth noting you can also use homeplugs from different manufacturers, so long as they're the same speeds they will all work together (i.e. don't try and mix 200mbs and 85mbs).
Best invention of recent times IMHO, couldn't believe how well they worked and how little faff was involved when I first got my pair of Devolo. Have added a Solwise (from OCUK) since for my sons 360 and have never had a glitch.
Are right, So if I connect another homeplug it will run off the same port the one is connected to on the router (port 4)
I would have thought it would need to run of 1,2 or 3