That is about the same price I paid for the AC86u some years back.

Are the improved specs efficacious if I am only going for the 500 Mbps package?

My devices are mostly from pre Wi Fi 6 days.

Thanks. I had forgotten about this. I used it when I used an older Airport Extreme.

I just ran it. Strangely, it suggested 165 and 128 as the best 5GHz channels. I had previously used 165 and got the poor test results. I can't select 128 as it isn't in the dropdown box

I think I must have set up the ASUS router using this as well.

My RSSI is -55 - that is the best I can do, a long way from your -27.

Thanks again

Thanks. I had forgotten about this. I used it when I used an older Airport Extreme.

I just ran it. Strangely, it suggested 165 and 128 as the best 5GHz channels. I had previously used 165 and got the poor test results. I can't select 128 as it isn't in the dropdown box

I think I must have set up the ASUS router using this as well.

My RSSI is -55 - that is the best I can do, a long way from your -27.

Thanks again

Yes, but like some other forumers mentioned, by default you can't choose.

I think in my case, there were 2 things that worked in my favor:
1. The salesperson promised me the Dlink
2. There was an exact model (but with some red stripes) in the Unifi Centre itself, with the price tag of FREE if you sign up 100Mbps and above.

They were very reluctant to entertain me, and I pretty much gave up already. Didn't really pursue it after a few calls and follow up.

Then suddenly, they called so I just agreed to it.

I am on SWU 3.0 500Mbps.

I guess some ISP is special?
Unsure, can be their tech setup it wrongly?
Based on this thread, UniFi
https://forum.lowyat.net/topic/5073652/+100

I think If you feel slow down, then try disable IPv6 la, but the issues is mostly caused by the throttling of UniFi on SG, like the rerouting of HK to SG CloudFlare now....  
---
For your info, I performed testing on www.lazada.com.my with IPv4 and IPv6 of Google DNS and CloudFlare DNS.
Here is the result.

2606:4700:4700::1111, MY
2606:4700:4700::1001, MY
1.1.1.1, SG Akamai for IPv4/IPv6
1.0.0.1, SG Akamai for IPv4/IPv6

2001:4860:4860::8888, MY
2001:4860:4860::8844, MY
8.8.8.8, MY for both
8.8.4.4, MY for both

This is why I prefer Google DNS, lol.

For the extra, both IPv6 DNS got reaching issues for Public Bank's DNS server, lol.
https://www2.pbebank.com/

Yes, there is 10s timeout for public bank.(old is 30s)
This might be caused by the caching time TTL is 30s, but strange that if I check via Android network tools, it is fine....
---
More testing on PBe, it works well also on DNS over HTTPS, both IPv4/IPv6, so...
Seem like only happen on DNS over UDP for IPv6 la.

Don't la, later my lazada slow down because you guys back to MY CDN.
---
Depend, it is pure luck, sometimes if UniFi choose to kick you SG Google DNS, then you still get the same, lol.
The problem of stay too closed to SG lol, not the fastest speed, but the worst routing issues.

Anyone looking to buy FIBERHOME SR1041F AX3000 WiFi 6 Mesh as I have 2 units, prices are rm150 for both brands new. If interested, pls pm me. Collecting dust 

who and why reported my post dafuq, i didnt break any rules
ya, im selling at garage sell and carousell as well, but so far no respond at all. Even super cheap also no one wants 

Thanks for the advice!