Just unwrapped my CM1200. I had to call xfinity and have them add the MAC address and send the reboot signals but after that, everything worked as expected. My happiness comes from the speed tests, I tested my old 8x4 DOCSIS 3.0 router three times and managed ~127mbps over 5g. With this new modem, using the same WiFi router and test, I instantly got ~175mbps (which is above my service plan of 150mbps).
