My overall opinion about unifi(800mbps) for 3years.(Using Unifi Since 2010 or 2011)
My network device:
ONU:Alcatel-Lucent I240G-T
Router:Mikrotik RB5009
Wifi AP:Xiaomi AX3600-CN ver

Uptime: 99.9% average uptime per year,0.1% due to midnight maintenance or some short term maintenance-Rarely happens(like almost 1 weeks every days specific time will slower speed like below 200mbps)
Speed:
MY:
Always full speed from local national server.(90% fast server, 10% might lower speed)
SG:
50% SG server can get full speed as the routing is well.
(Another 50% will be getting lower speed or ridiculous low speed due to the unstable routing causing packet lost or some else issue. or QoS)
Worldwide:
80% worldwide server speed is okay,and 20% country server might be slow due to routing non-optimize or congestion.(Without submarine cable break)
50% country server is okay,and another 40% will be slow due to due to routing non-optimize or congestion.(With submarine cable break)
Latency: MY: 95% national server low latency,5% server higher latency due to routing issue or congestion.
SG: Similar to speed opinion. but higher latency does not mean lower speed,just because of congestion or routing non-optimized or QoS.
Worldwide: Similar to speed opinion. Unifi always got alot of strange routing issue to worldwide server,so this really depends which server that want to connect.
IPv4/6:Unifi IPv4 connection so-so(Details see above)
Unifi IPv6 is not stable.(only 30% of the connection is okay to use,70% of ipv6 between unifi and others server almost crap)
Sometimes when IPv6 is enable,u might see slower connection compare to IPv4.(Most unifi IPv6 routing almost non-optimized)
Normally most unifi user that cant hit full subscription speed are due to
1. Non-Lan cable connection (Wifi hard to hit full speed,but if router and end device is good enough and Wifi 6 supported then full speed is hit-able on wifi)
2. Using non-powerful router (TM free given router normally is crap)
3. End device is no powerful enough,due to higher speed need more powerful device to utilize,it is possible that some low end or older device cant hit higher speed.
4. End device or router faulty (such as PC driver issue or software/hardware issue)
5. Local Area unifi congestion or the same time unifi is having issue( This Rarely happens)
This post has been edited by go626201: Mar 14 2022, 10:05 PM