Ono! This is the real thing - fast food Hawaiian Style.
When we were in Kona last December we had lunch at an L&L --- because we wanted local food and they were the busiest place we saw. Well, the menu is exactly the same at the north Phoenix location (they also have one in Mesa). It may not be the healthiest food, but it sure is good!
L&L is in the Happy Valley Town Center shopping center (at Happy Valley Rd and I-17), across the parking lot from Lowe's.
Note that the Aloha Kitchen in Mesa, Arizona is more of a Hawaiian style mom and pop corner restaurant than is L&L - if you prefer that.