Years ago I had a set of Powerline Network Adapter (85Mbps). A disaster, did not work, constant interruptions and lame without end. Now, the TL-PA6020KIT as a new attempt in 2013: Super result, fast connection, easy installation. For all powerline adapters in large houses: is an urgent need for more electricity networks a so-called "Phase Coupler", connecting the networks. Cost point at a company about 100, - to 150, -. Or even install, if you know your way. The networks remain separate for consumed energy.