I love the equipment for small-scale commercial solutions and quality without the price tag. I might not recommend their products for a large organization with multiple locations and servers. However, the GUI interface will allow remote access and setup across the network. I think this is a great solution for small businesses and families or home office solutions, provided there is some IT knowledge for setup and maintenance.
Ubiquiti is well suited to not just indoor WLAN access, but also outdoors. In fact, the range of the outdoor applications, while maintaining throughput is astonishing. I would say this is not a solution for a 1-5 person small office, due to the costs.
Management of devices has become much simpler with the UNMS application, but personally, I would like to see some AirMax-like devices from their Unifi line where everything could be managed from an Unifi controller.
Most Ubiquiti devices are 24V PoE, which is the bane of my existence. I have had several devices fried when staff plugged into standard 48V PoE. They generally don't fail catastrophically, either. You just get strange issues that are difficult to diagnose and eventually need to replace them.
Devices seem to have trouble with many patch cables/switches. Make sure you certify any patch cables you make and don't over crimp.
Sending devices from the factory with same 192.168.1.20 IP instead of DHCP makes it a pain to bulk-setup devices.
Ubiquiti makes great Access points at various tiers provided far better coverage and throughput than consumer-grade wireless repeaters and routers. We have not had any performance complaints from guests or from the administration who use the wifi on a daily basis.
We have not needed to contact support, except to replace one device that was damaged in shipping. The company immediately issued an RMA without delay, and we had our replacement product within a week
Ubiquiti's support is basically non-existent by design. However, their forums are a great resource if you are willing to do the research and ask questions. Keep in mind Ubiquiti sells hardware, not support so the responses will be from the community of professionals also using Ubiquiti just like you.
Prior to this, we used Cisco Meraki wireless access points, which did not allow for centralized control, therefore several access points shared the same SSID. Because the client's movement from one device to another was not as seamless and reliable as it is with the current Ubiquiti solution, this shift cost both time and stability during configuration.
We have used products from Netgear, ZyXEL, Cloudmesh, Datto, Mereki, and EnGenius previously often choosing products based on a specific situation, since starting with Ubiquiti [WLAN] we have pretty much stopped [usage] of all other vendors in the networking field and standardized which better allows us to stock spare equipment. Best part is if you need to replace equipment it is easy to swap it out quickly as the controller also acts as a live configuration backup.