Pretty good! We tried some kalua pork tacos and malasadas at the Street Truck Festival. The kalua pork tacos were pretty small, with more of a focus on the pulled pork rather than the taco as a whole. The meat was moist, and had a nice flavor, although I do feel that Golden Hawaiian BBQ has better kalua pork. The malasadas were the "Secret item" of the day (Show them their Secret Item picture from Twitter and you will get them in a little paper bag). This was my first time trying them, and they reminded me a lot of Chinese-style doughnuts. It had a nice sugary outer coating, with soft fried dough on the inside.
If they are in the area, I'd definitely like to try Island Loco for more Hawaiian style eats!