It's simple and it works 1

First of all, I appreciated the small size, which is smaller than some mammoths like that Free offer.
The installation is all that is simple. A first module into a wall outlet connected to an output of your router, and a second between another wall outlet and your computer. Basta.
If you want to add a secure connection, simply press the side button of the two modules and wait for the technology to do the rest, ie sync.

Performances:
Plugged directly into a wall outlet, the flow is excellent, even between two remote rooms 15m. (A diode indicates by its color quality Green debit> Orange> Red)
I also tried plugging in extension cords. There, the flow takes a hit, and depend on several factors (quality strip, the number of attached devices, etc). Avoid even if our facilities at home almost all revolve around a power strip or UPS. Prefer a single wall outlet.