Npower say:
"You could save money, energy and time!
Also, unlike traditional meters, Smart Meters are read remotely. This means you won’t need to answer the door to the meter readers, fill in a card or even provide readings online.
Smart Meters will provide you with much more information on your energy consumption allowing you to be more fuel efficient and save money
An end to estimated bills! You will only be billed for the energy you've used - giving you more control and potentially saving you money. It will make it easier for you to manage your payments and monitor how much you owe."
Actually, other than the odd rotating disc meter, every 'my meter is overcharging me' job that we've done (12+) has proven the meter to be highly accurate, much to the annoyance of the customer who is then left with a ÂŁ100.00 bill for our 7-day load profile test!