I'm a bit of a coffee snob and use a Rancilio Silvia at home. Personally I don't mind the espresso at Al Bacio, it's pretty inoffensive to my taste buds. Even if you brought the AeroPress wouldn't you have to also bring a hand burr grinder? Seems like the toughest part of the equation would be finding somewhere on the ship to get water at the right temperature without looking like a crazy person...