I have the powerline adapter. I've got it upstairs connected to a wireless router connected which is connected to a cable modem. The adapter itself is connected via cat5 into the wireless router and plugged into a wall outlet. I have the other powerline adapter in my family room, plugged in to the wall outlet and directly into my HR23. I've had it connected for the few months. It works great with PPV, On Demand, and everything else.
