Not a bad place, but not the best. I usually get a Loco Moco, BBQ mix, or Katsu/Cutlet, with the occasional spam musubi. I recommend getting a regular size meal over the mini, because it really is mini. The regular sizes are about double the size of the mini for about a dollar more.
Its a small place, not really ideal for a family dinner, but more for a quick bite or if you don't feel like cooking at home.
I'll stop by here if I'm in the area, but I've been to better Hawaiian places.
ps. They have a $15 minimum for card which is A LOT considering their meals are $6-8 on average, so carry cash.