To extend an existing network, the laptop computer of my son, and a Blu-Ray player to connect. My other Netgear are all taken to the Homeplug AV + standard, connected with the encryption button present on the catch.
It was enough to plug in, press the button of each of the 2 new 1401 without resetting all my network and they have been recognized on.
By cons they plug into the power outlet in one direction, take the highest range models to benefit from 2 directions (this is the case for XAVB2501, 5501 and 5601 I already own).