The Firebox Nano on it’s first test run making soup with less than 2 ounces of Alcohol and simmered for over thirty minutes with the Esbit stove. The soup was comprised of my own dehydrated vegetables and Beef Jerky and the stove combination worked as advertised and had a lot of fuel left when the soup was finished.
Yes I used the simmer ring after the soup came to a boil, the liquid was over 3 cups and the vegetables and water were direct from the refrigerator.
I personally will use the stove with the Alcohol burner only and not wood as I see it as a quick hot drink or soup type meal stove at this time.
I know it would burn wood just fine but I have a larger Emberlit that can also use the alcohol stove or smaller pieces of wood so now I have a wood burner and an alcohol burner for emergency use along with a Jet Boil that I plan to use for actual cooking.
But to have a fire box stove that will fit in my shirt pocket is very nice!