This topics been done to death!!
FWIW we ran an alcohol stove for 10 years or so (for all the usual reasons, and, it came with the boat) Ultimately switched to propane and wouldn't go back.
High cost of fuel, smelly lightoff (though we addressed that issue) invisible flame turned us off, though a wick style (Origo) that runs on good old Methyl Hydrate gets better reviews.
But properly handled, propane is safe enough, quick, clean and convenient. Carrying it for the BBQ anyway, we have a propane fireplace/bulkhead heater too.