If it was a massive advantage, they wouldn't have to sell it so hard, shirley?
Guess I'm an old fashioned guy when it comes down it, I like to buy me Gas from the Gas Board, me Electric from the Electricity Board, me Water from the Water Board - & everything else from the Supermarket!
I've had 'em round, one spoke to me & was turned away - they phoned the next day & spoke to my wife & tried to convince her I had agreed to the transfer