Originally Posted by
number_6
The problem with powerline is you are susceptible to interference from your neighbours (unless you have very expensive isolation gear). They install a new box, and your error rate goes up 3 orders of magnitude. Bottom line is that it is never a reliable system unless you know whom your neighbours are and can control them

I've yet to run into this, unless its an apartment thing.
House wise I've seen them not work in new additions such as a basement or work shop. So how its going to traverse a wire to the pole then back down to your neighbor and cause issues...