Fwiw ubiquity devices are some of the "set every setting to never call home but still did" devices. I cant remember if they also tried to bypass the configured dns.
I still use it but keep the devices on a vlan that cannot dial out.
And use the software not an appliance to manage it.
Its not just the slick ui, its the devices themselves, and how well it all works. I got fed up of wifi at home not being as good as at work. And unifi are cheap compared to some corporate grade stuff