I've had it before and I found:
Takes a long time to get sorted
first you get the TV
wait a week
then get phone line
wait 2 weeks
then you get the broadband
When I lived in the city centre it leeds the £5/month broadband was giving me approx 8 meg for downloading but when we moved to the surbs the phone line was a lot older and i was only getting speeds of 0.5 meg
I had to go virgin in the end
I would ask them to see how fast your phone line is first and what actual speeds to expect
anything over 5meg is acceptable if you want to use it for games & bbc iplayer etc
Its also unlimited usage which is good
Pretty cheap too if you want/have sky tv
customer service is ok too
I give it 3.5 icepops out of 5
If you dont need sky i would go talk talk or check moneysavingexpert.com if youre after best price
hope this helps
Nicolas