BT Broadband here ..
Only problem I have had is when my "Frog" USB modem went "out of sync" (Whatever that means).
Took about a week for an engineer to come out and replace it saying the classic line of....
"First time we've had one of these go down" !!
Otherwise .. I Recommend BT over every other Uk provider....However.. My brother, who was a BT engineer for 23 years (just took voluntary redundancy) was himself "Kicked" from his ISDN Anytime account from BT ... Turns out "Anytime" Isn't ANYTIME.
And DOES'NT recommend them at all ...
Bhoggets course of action is HIGHLY recommended by my bro as the "Way Forward".