Extend your Wi-Fi with powerline networking

I've tried many ways to extend Wi-Fi through my house. Powerline networking, which creates networks through electrical wiring, works the best for me. TP-Link has this kit with 2 units. One unit plugs into your wall outlet and router. The other unit can be plugged into any wall outlet in your house to provide Wi-Fi in that area. I've had great results with it.