Only complainers make a noise
I was with UKLinux.net (Entanet reseller -> BT Openreach) via FTTC and then copper to my (overhead cable) house - about 150m copper (and it is ALL copper apparently from BT guy in the hole).
Only got 38Mb but have to say it was very reliable (from my SamKnows box info)
Went to EE (I know they are part of BT now) and got a bundled reduction in home BB (already had mobile with them)
Big cock-up on changeover as BT Wholesale hadn't done paperwork properly years before and said I was still with Entanet. Took 2 months to sort (EE very helpful and informative - gave me 12 gb/mnth to use my 4G phone as internet connection whilst sorted)
End result: now get 48mb+ (still good and reliable) - only downside is the old cable /connections to exchange (less than 1.5 miles).
OK not greatest. But it works *reliably* month on month speedwise and connection. Reliability is all for me. Don't do streaming of TV/Video/Facetwat YMMV
If you are happy with service level; you don't post and nobody knows..
[FFS why have 8 million concurrent downloads of Eastenders clogging interwebs when they could record on their Mythbox over FTA Freeview and watch later. Sheesh]