I have been using Tiscali Broadband for a while and have no problems wit hit.
Think there was a while ago when it first set up, but always very good now.
In fact, excellent. Took AGES to actually get my hardware and the call centre helpline was shocking, but from knowledge of all other providers (including Telewest and BT) this is never any different.
All I would say is don't go for the cheaper option (£19.99 a month?) as it actually half speed of the full £27.99 a month service.
Don't skimp, you'll regret it!