I recently bought a pack of 3 X60's (Ver 1). So far I have only set up one unit as the main unit (I'm moving houses and keeping the rest in the box for now). I have it running with the default config,

So I just set up my 3 deco m5 mesh points. I have 1Gbps fibre and am getting 400+ over wifi from the main deco which connects to the modem. I then connected the second deco upstairs via a Cat 6 ethern