An update on how mine service has been going since the install.
tl;dr - Very good once I got off the CGNAT
The first few days were a bit hit and miss, I saw fairly constant but very short outages. Maybe 3 seconds every hour.
I got swapped over from the CGNAT to a different range which has an IPv4 pool and it's been much better since. Almost no drop outs.
The people in customer service were trying to be very helpful but I don't think they knew much at all, They also wouldn't put me through to their level 3 guys, so presumably it's a very small team and they're trying to ring fence them for real issues which is fair.
I've never seen any issues with speed in the evenings.
I still have the Linksys connected directly to my Ubiquiti kit, but I did manage to run some Cat 6A to my office, so I now have the full 900Mpbs to my desktop and I think I've only had one drop out since then.
A few people mentioned DNS, mine is pointed at CloudFlare and I use a Pihole with Unbound for recursive DNS so most of it happens in house.
I'm not sure anyone needs the full 900Mpbs like I have unless you have multiple people who really want connections of around 300Mbps each at the same time. Most websites and services don't offer anything over 300 from what I've seen.
The PS5 wired in directly can get about 700Mpbs as said in my last post, but if there wasn't an offer on then I doubt I could justify paying for more than 500.
Here's my BQM
My Broadband Ping
I've had it installed this morning. It took the engineer a few hours to install the ONT but it's a very tidy job, so no complaints there.
I'm happy to say I got the Linksys router and the engineer told me that they're putting new customers on the Linksys now.
I've been able to get 945 download and upload even on Speedtest.net, although that varies a bit. The engineer claimed the speed test on the Linksys which talks to their kit is more accurate, which is nonsense, but I get good download speeds out of it so no complaints yet.
I took a cable out of the Linksys and put it in to the WAN port of my Ubiquiti kit and it's been smooth sailing so far. I also wired my PS5 directly in to my UDM and that got around 730 which is much better than I had before.
I've spent most of the day on a desktop running on Wi-Fi until I can get some ethernet to my office so I haven't really tested the full 900 but I've been running a ping from UptimeKuma and haven't seen any dropouts yet.
I'll report back if I see any issues, especially the congestion in the evenings. I think I'm one of the first customers in this area so it'll be interesting to see if it is a nation wide issue which I see straight away, or if it's more down to local contention.