I have a first-gen SBG7580AC (the one where it didn't say McAfee on the box). Knock on wood, the thing has been rock solid for over a year both as a cable modem and as a wi-fi router. There was a hiccup when Comcast pushed the McAfee update to the router, but I restarted it and declined the McAfee terms and it went away. The modem even performed fine on DSL Reports' Puma 6 test.
However, there is one persistent annoyance: When I go to 192.168.0.1 to adjust the router config, it takes almost 30 seconds to load the login page; and it's slow to switch between pages after that. (It was much faster when I first bought it, so I assume it has something to do with a firmware update.) On the other hand, visiting 192.168.100.1 to see the cable modem status is still instantaneous, as it should be.
Anyone else with an all-in-one Surfboard box have similar issues?
My config for reference:
Model SBG7580AC
HW rev: 1
Bootcode: 4.2.0.45
Firmware: 9.1.103AA18
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