Oh man, what a headache.
Depending how one configured things, there’s at least 3 ways to provision devices - all 3 incompatible and will cause issues with each other. User manuals refer to Apps no longer in existence. In no instance have I had a “just works” experience. In two instances the option I needed to configure was not available through any of the 3 (4?) dashboards and I had to resort to sshing into the device.
4 weeks later I’m still experiencing ISP fiber modem disconnect issues every 48 hours and can not connect remotely to debug. The impression I get is 90% of the performance “gains” one gets from switching from Asus to Ubiquiti come from dedicating one $300 piece of hardware (which overheats) for each network function (firewall, switch, router, AP) rather than using a single threaded all-in-one device. Then people still bolt on accessory devices like pi-holes when a USG should be perfectly capable of performing the task.