Having clocked up 4 out of your list on FTTP I can give a summary of my experiences:
Trunk Networks same ISP as NoOne Internet (note that they do use Zen backhaul as well as Vodafone, so you will need to ask them if wishing to chose one over the other), very helpful when I wanted to join them but they couldn't connect me at the speed package I wanted (capacity issue on Vodafone back haul in my area), so can't comment on the service.
Cerberus, reliable service and responsive support, via BT Wholesale as far as I'm aware, had a few issues at the end of my first year that went on for a number of weeks (affected many of their customers but long since resolved), and their pricing for 1000/100 FTTP was at the time of renewal very steep, so didn't stay with them.
IDNet: On migration had a couple of days of no service so got to try out their support, again responsive, turned out my account wasn't set up correctly and they had to resubmit it, which sorted it out, but it did take a couple of days before someone thought to do that. I got the impression they were having to check with Zen their supplier for backhaul which added to time to sort it. As IDNet had me going over Zen backhaul, there were various small issues, the main annoyance with Zen is you get connected via widely different routes, sometimes latency was doubled because I was going up via Manchester. I could drop PPP and reconnect and eventually get London routing, only for Zen every couple of weeks drop my connection overnight and I'd be back to Manchester. I really did not want to play those sorts of games with FTTP, it felt like a step back in time hoping gateways at PlusNet. I asked but no option for me to change backhaul to get off Zen. Speeds were okay, hardly ever maxed out the package speed, and also slower via Manchester.
Aquiss: Easy migration. Support really responsive. However Aquiss resell CityFibre, this means any technical issues have to go via Aquiss then to CityFibre, or what is left over of Entanet. On joining I immediately had issues with congestion during the working week from 9am with packet loss, high latency and speeds dropping like a stone and I couldn't do much online when that was happening. There were periods things were okay, which coincided with school holidays. After 6 months of me raising issues and Aquiss reporting it to CityFibre and not getting anywhere, I was allowed to leave without penalty early.
AAISP: I'm on BT Wholesale backhaul but they also use Talk Talk Wholesale. Just wanted to get back to a smaller ISP where you could speak to people that had direct access to getting fixes in place if required, and they had started to offer the faster FTTP packages. Migration all went smoothly. Had a few things I needed to check with them on going live and it was all sorted within minutes. Speedtests are the best and most consistent I've ever had from any ISP showing no sign of congestion, and using the connection day to day everything zips along. AAISP also pick up on issues and get fixes in place within days or hours it seems.
As for backhaul I would avoid Zen, they don't seem to think that dropping connections every few weeks is a problem. I never had more than 30 days of up time with IDNet before the connection dropped overnight, Cerberus prior to IDNet I got to a hundred days or so before I needed to reboot the router for new firmware and reset the counter. Also Zen seem to be in a constant state of change, moving from one new network to another, as soon as everyone is migrated onto their 'new' network, they seem to decide it isn't good enough and they start again.
Hope that helps.
Edited by E300 (Wed 08-Jun-22 13:39:20)