I've only used my Esbit stove and fuel for a couple week long trips. Works fine although slow, out of the wind with my MSR windscreen or foil, boiling two cups or less of water in 12-15 minutes on less than one tablet. Seems any excess wind is death to it. You need to wipe the crud off the bottom of your pot on some grass or tp. Stinky stuff even when stored in double bags.