Easy connection, no noise

Based on the positive experiences with my larger devolo dLAN 200 (since 2011 without a problem in continuous operation) I have used for a second PC, on a different floor, this smaller Devolo today. Both devices are connected, each pressed the small encryption button and you're done. Internet was there immediately. I even both devices plugged into each of a multiple socket, a next the Devolo 200th
My wife has tested both devices set to the often mentioned whistling noise: Nothing! The error seems to be eliminated -as angegeben- from Devolo.
Highly recommend buying!