I’ve had good service from UniFi hardware for the most part. I’ve used multiple APs in my home for a decade, and helped install in 2 homes and a small office. Their cosmos integrates well, they are like the apple of soho networks.
I’ve used them at home without a hardware controller - i use the windows application controller software to configure them and they just work until the next time. Ive known 4 of their POE switches in use, and one failed from a weak capacitor in the power supply. Their technical support was dismal. For POE switches, for me it’s either Cisco, or something cheaper with separate POE injectors. If you’re on a budget, used Dell Powerconnect switches can be had for cheap on Amazon, and these are solid like old Cisco gear. Multi-port POE injectors are not expensive, and now that I’ve seen what lightning can do to Ethernet when it hits nearby, I’m fine not having all that $$ stuck into a non-port-blocking POE switch.
i like the features in their surveillance kit, however the intelligence sits in the cameras, not the software, which makes them proprietary. For non-IT folks, it’s not a bad way to go. If you want a 12 camera commercial setup, I think there are better options to consider.
but as far as their WiFi, they work great, don’t need a controller to play, mesh well if you need to, and rarely fail. They Do fail, however, over time. Just not as frequently as the stuff I used to buy at Walmart.