Beautiful and useful product. Connecting is arranged in no time and it works immediately and without any problems. An example of how to do it.
I am not happy with the housing size that is too large: if you have double wall sockets where the sockets are placed one above the other, there is too much overlap and you can only use a flat plug in the other socket. A round or grounded plug no longer fits and then I wonder again with a very deep sigh how they could have come up with this. So design gets a big unsatisfactory from me, although it looks nice otherwise.
But what it's all about: speed. It depends on many factors and unfortunately the rating of the dLan adapter is only one of them. In a big old house like ours, that's disappointing. Wired directly to the router, I get 120..125 Mbps at Speedtest. Wireless 5 GHz is 75..85 Mbps and wireless 2.4 GHz 35..40. Wired with the Devolo dLan 550 that is... 35..40 Mbps. Ouch! That's only 1/3 of a real UTP cable, and equal to 2.4 GHz WiFi.
So no benefits? Anyway:
Although the connection is not faster in terms of throughput, it is more stable in practice. My TV can't stream HD wirelessly from my NAS, with the dLan adapter it can.
The adapter also puts less strain on the WiFi network, leaving more bandwidth for all those other devices.
Overall: recommended, but to expect good speed you have to be a bit lucky with the situation in your house.