it varies a lot!
for example,. after sorting out a problem with NTL. virgin media my connection in Nottingham was rock solid.
similarly in newcastle, however, we dumped the connection, before I moved in...because they wouldn't upgrade the 5 year old TV tuner...muppets..so we now have SKY
SKY BB is cheap as chips and I would never have it again
too many max hops...no fast path option in their configuration, bad line speeds and unstable connection...however, that could be either our line or their config..it's gotten a lot better recently.
So everything is relative...customer service response and quality should not be discounted.
SKy BB though is not for a demanding user (I count myself as such as I want good latency, min hops etc for gaming hobbies, high percentage of uptime and no dropouts during the day which require a local reset as I access my PC from work quite a bit)
In fact during one problem, when they changed my default settings as it was unusable for the above, I almost got the level 3 tech support bloke to admit it was mis-sold to us regarding 'gaming' as it's completely unsuitable. I didn't want to push it though as he was very nice and as helpful as he possibly could be. so top marks to him, not to Sky though,.
If you are a demanding internet user though, steer clear of SkyBB.
people rant on about Oooooo ADSL 20 meg soon...cable broadband has been providing me with 20 meg on virgin media for years.
they're running 50 meg now if you really can be bothered.
if you have a GOOD quality phone line and are close to an exchange though ADSL suits a lot of people
oh yeah...look for ENTANET resellers. the quality of their BB is rather good I've heard.
also heard good things about ZEN and bethre too