Summary: These set up very easily but a big caution: If there is any kind of filter, noise, surge protectors or even too much wire between the units they will not work. I find that when I have them on outlets on the same breaker they work fine but go across breakers, through power strips, through surge protectors, etc they will not work.
Summary: After reading all the glorious reviews here I got two sets of this kit. Initially I was ecstatic ! It worked right out of the box. A truly plug and play. I was downloading from the internet at full 10Mbps (according to speedtest.net). I thought everything was good. But then I started to stream TV shows (recorded from OTA) from mythtv media server and trouble started. The initial throughput from one room to another on same floor started around 3.5 MBps (about 30Mbps).