I am looking to buy a cheap and cheerful cooker, but am having trouble trying to work out what to buy. So far most of the cookers I have seen are gas - do these all work off bottled gas and if so, is this more economical than electric? There is a good range on the Darty website - if I pick off that according to what I want to pay will I end up with a reasonable product? Its for a holiday home, so it isn't going to used every day. Thanks, Sue V