I have odd issues with some of my devices every few weeks, though none of my Apple stuff, where they seem to stop getting DHCP leases (or stop using them?) for no discernible reason.
Restarting the Google box always fixes it, but it’s extremely annoying.
That was never an issue with my AirPort in charge of things.
It gets automatic regular firmware updates to stay insync with Chrome OS, so it should always be patched.
It has a dead simple user interface, though it means many power user features are not there. Though there is a project out there to root the device and do more with it. https://github.com/marcosscriven/galeforce
While it's true that it has a relatively simple user interface, I've found that it has every feature I've wanted and I'm generally a power user. I can set access schedules for my kids' devices. It even has a "porn" filter but I don't use that so I don't know if it's effective. I can prioritize certain devices so they get first dibs at bandwidth. I can reserve static IP addresses for some devices, and I can do port forwarding.
I feel like those features and probably a few more that I couldn't think of off the top of my head are going to cover 99.99% of all users' needs. I agree there are other devices, especially if you flash your own firmware, that will give you more fine tuned control. I just didn't want to leave anyone with the impression that it lacked the major features people will be looking for.
The only feature I personally would like to use that it doesn't have is the ability to configure the router as a VPN client.
