These cooking stove discussions seem to produce enough "heat" to brown up some croissants. (sigh...)
One little fact that is missing from several replies is the amount of heat one can get from a burner for any given fuel source. Note that a 5250 BTU burner (in my Origo 6000 range) heats your food the same as any other burner rated for about the same BTU's.
Matters not whether it burns alcohol, Kero, diesel, or electrons.
I have used our Origo Non-Pressurized range for almost 20 years, and before that a propane system for about 9 years.
Prior to that I tried to learn to get along with the Primus kero stove in our prior boat, but was not able to learn enough Swedish swear words to make it behave (?). It was the legendary "Chichester" Model. My abilities were less than legendary, and a liveaboard friend eagerly bought it from me. He loved it!
I have been on a lot of deliveries over the decades with pressure alcohol and would not want it on our boat. Too dangerous.
While ANY fuel and system can be mastered and made safe (except maybe that contrary Primus!), and I do confess to liking a well-maintained LPG system, the simplicity
of the Origo is just wonderful.
*Sidebar: there is actually an extremely easy way to refill the canisters. No spills and no hassle.
It's been mentioned on these forums elsewhere, and if someone wants, I can put it in a reply again.