Was with NTL for Cable TV, Broadband and Phone.
Now with SKY for SKY HD - they gave me £100 off the purchase price of the box as a "convert" - but had to push them to get this.
Stayed with NTL / Virgin on their "Up to 2 Mb" service and Phone package.
No noticable change since Virgin took over, but I DID have a broadband speed problem a few months back which was eventually diagnosed as a duff modem - I had the "NTL 100" model, which has now been replaced with an "NTL 250".
During the diagnosis of my problem, NTL recommended that I download "Dan Elwell's Broadband Speed Test" to check what connection speed I was actually achieving.
This can be downloaded FREE here :
http://www.broadbandspeedtest.net/ - It will run a number of tests and provide results. More advanced tests and their results require a subscription.
Once I had my results I reminded NTL that I could get SKY Television's "Up to 2Mb" Broadband Service for FREE, and they soon sorted the problem