I've been a happy customer of Andrews and Arnold ("AAISP") for many years.
During that time, I have had a number of changes in circumstance (moving house, upgrading to VDSL, and most recently upgrading to FTTP) and in all cases they have provided an exemplary service that has made the move as seamless as possible (literally seamless in the case of the move from VDSL to FTTP - I unplugged my router from the VDSL line, and plugged it in to the FTTP line).
The self-service tools that they provide e.g. for monitoring line quality are fantastic and as far as I'm aware, no mainstream ISP does this.
There have been a number of problems over the years: faults on the BT line, multiple faulty OpenReach modems and one instance of a problem of my own making. In each case I was able to contact a member of A&A's technical support team (not a call centre) who provided assistance and coordinated where BT/OpenReach needed to come and fix the fault.
I think the base cost for A&A works out a bit more expensive than the cheaper ISPs, but I think this is justified by the very low contention (I've never noticed an "evening slowdown") and high quality technical support.
Time With Provider: 15 Years
Package Name: Home::1