I love these guys, I don't go often since they're out of our way so instead we go to In-N-Out for premium burger needs but I love Island Burger. The staff is always great, the place is always clean, the burger options are fantastic, my sister enjoys their very healthy portion of chicken in her salad, and I always try to get the healthiest burger (turkey instead of red meat) to justify gorging myself on the unlimited fries.
This isn't a $4 burger, you'll going to pay $10 a person at least but the burgers are big and tasty and you can substitute anyway you want. They have a lot of other stuff, including fish tacos and bla bla bla I always get the burgers. I honestly can't remember if I've ever left unhappy, maybe once but personally, I never hesitate to go here if I'm in the mood to pay 10 bucks for my burger and fries and the long drive. They're awesome and I plan on seeing a movie and eating here tomorrow.