I used powerline in the UK without issue, with the more recent ones that is.
Zyxel (sp?) pretty good make and support is good, one failed so they sent a replacement pair.
Using a TPlink pair here in the US, discovered the power supply for the shite AT&T modem/router actually knocked the powerline network out.
Had to plug it in to a surge protector strip (the power supply that is) and all is good again streaming Netflix in HD.