I'm considering getting one as our electricty bill is higher than it really needs to be, and I'd like to see where it's going. I'm not sure how they work though, do you have to go round the house switching everything off and then turn them on one at a time to see how much they cost to run? Do they just give you the cost per hour, or will it tell me, for example, how much it costs to boil the kettle? Does it need wiring in to the electricity meter or something?
Tell me about yours, has it saved you money? Does it have useful features, or are there features you wish it had?