have been with ntl for about 4-5 years now, the first few of which we did have a few problems but they would send engineers out within a couple of days and usually fix the problem! i seem to remember very long queues to get through however, and the old STB reboot routine became annoying - surely most ppl try to reboot something if it goes wrong before ringing up!
have moved house, no problems there, was working when we moved in.
the last problem i remember was a fuse or something blowing in the junction box on the street, probably over a year ago now, left us without tv and net for a day, but those things happen! and it was much quicker to get through when i rang for that! the engineers are always top blokes, usually explain exactly what they're doing.
generally things seem to have improved greatly over the last year, have only had one outage, and that resolved itself, compared to getting outages every month or so a few years ago.
very pleased with the broadband speed upgrade (although i notice its nearly half price for new customers

) and my email (touch wood) has been fine for ages! (i seem to be lucky though from what i've read of other people!)
i think with any call centre, a lot of it depends on the individual you get at the end of the line, and their capability and experience - if you get a new starter its more likely they will take longer to sort out your problem than someone whos been there for years! I've worked in a call centre (not for ntl, incidentally

) so I've seen it from both sides!
its most pleasing to see ntl talking to the team here and taking on board the feedback AND then actually making changes!
sorry if i've droned on a bit!
cheers, james