I am very excited about the device. And I have already been set based on reviews from a return, as I have little idea about these things, and therefore things that have to do with PC, do not work with me often. I am in the telecom and have a 921 V router. In addition I had an access point for the 1st floor, which is broken. Since I have not dared to venture I to the installation of an access point, I tried it with this device. Maybe it was so easy for me, because before an access point was installed. I was right for the method chosen 2 (Quick Start Guide). These are just 3 !!! Steps. Important: Really only the connection to the router disconnect (step 2). After installation, I had two possible courses on the first floor. Both places I've been through each tested 10 times with Speedtest by Telekom. I've tried other speed tests that have delivered the same result. My initial speed was about 13 Mbit. Directly on the router, it was 35. At one point in the first floor, I now came to 26, ie a doubling of the speed. On the second point, I came to 33. So I did not expect. Perfect for a rest !!!