I spoke to one of those the other day, transferring my custom to them and away from a company with the most obstructive and unhelpful Indian call centres I have ever known - even to the extent of insisting that I must pay the company (TalkTalk) the outstanding months on the contract before they will release my phone line, depite that fact that they have breached the contract (hence me leaving); telling me that no supervisors or managers are available and dropping calls rather than transferring me to other departments that don't give out direct numbers. I did get it sorted in the end, but it took a lot of time and persistence and the lucky chance of accidentally being connected to a UK call centre.
I had a long and enjoyable chat with the Scottish operative and found that they'd regularly visited here (Manchester) as the woman that lived a few doors from us 'til recently was their aunt!
Now I'm beyond the sales point, it remains to be seen whether any customer queries/problems are dealt with as well.
SteveW