Well, Mauna Loa may be the historical innovators in introducing macadamia nuts to Hawaii, but they are certainly not the innovators in servicing visitors. To give them the benefit of the doubt, we visited on December 31st, so the factory was completely quiet. Nothing being produced except for cookies being hand dipped in chocolate by two women in the cookie shack outside the Visitor Center. Why didn't they get the day off like everyone else? Non-unionized workers? A different production category? Who knows. But even if the factory had been in operation, the "self-guided" tour would have been of limited interest -- basically a catwalk from which you peer into windows of the factory high above the heads of workers operating a long series of conveyor belts and machines with a very limited number of signs to explain what you are viewing. There were a couple of LED screens with buttons to press apparently for narration in several languages, but these also were not operating when we visited.