For outdoor cooking I have a large BBQ chef that sits unused because it takes a half bag of charcoal every time I fire it up. I have a small Japanese clay hibachi that works great and only takes about 5 briquettes to cook a full meal. But it still requires charcoal and is only a grill. I'm looking at building or buying a Rocket stove (probably building) and was wondering if anyone used one on a regular basis? By all accounts they are SUPER efficient and use a very tiny amount of twigs or cardboard for a given heat output.