Re: I have one because ...
There was an article a while back, showing that you'd need to do something like 20 wash loads on the weekend to make those "free electricity" weekend deals worth while, otherwise you're better off with one of the many cheaper suppliers.
It was simply a marketing gimmick.
If you need to use electric heaters in order to save money, then you know that smart meters aren't a good thing.
What happens in the winter, with a medium sized house? You would need a total of about 12KW+ worth of electric heaters dotted around the place, a horrible way to heat a home.
My current suppliers gas price is 20% cheaper than British Gas's, that's about £280 saved.