I have a Nissan Thermal Cooker and LOVE it, I use it a lot! The advantages with a thermal cooker are, once you have the contents of your meal boiling in the inner pot for a few mins, you can remove it from the heat source and place it in the outer thermal pot and it continues to cook. NO additional heat / energy source needed. It is safe for the truck camper users, because you can leave the cooker in the sink or on the counter and go hiking knowing that the food is still cooking without a continuous heat source!