I am a penny stove fan. I use it for just about all my trips under four "person-days" with me boiling two to three cups of
water for breakfast, and again for dinner.

If you made the simmer ring, it will burn a *long* time with that on it. I have used it to simmer stuff on a fill for around 40 minutes in controlled conditions. the problem I have with it is that it is a bit to wind sensitive and "fiddly" for me in the field - I tend to wanna just eat and not fool around.

For more than four "person days" - i switch to a canister stove, about 5 is the cutoff for me where the increased weight of the canister stove and canister is offset by the larger amount of alcohol I have to carry to do the same thing.

The caveat to that would be if I ever do some kind of thru hike where I need resupply.. Canisters are hard to find, relatively. I can get heet (gas-line antifreeze - methanol) at any gas station in canada anyway.