I have two X20s (set A) working as a pair on my home network. They are fine and have worked well for 3+ years. (Although they seem due new software by now.) A friend has been given another pair of X20

I have been running a couple of X20s (1 is Main) and 3 M4s in Access Point Mode connected to a BT Smarthub (~72Mb) for the past few years quite satisfactorily. The Decos use wired backhaul. The BT Hub