You will have a good tasting meal served by friendly people at a reasonable price if you decide to give this place a try.
The cafe itself is comfortable. The decor of the cafe is fun, but you're not going to accidentally forget you're not actually in Hawaii.
The servers are always friendly and prompt.
The quality of the dishes range from quite tasty (kalbi) to good enough (just about everything else). There are some Hawaiian restaurants with much better dishes at the same price point, but not in the immediate area.
Their kalbi is their stand out dish. Definitely worth it to go there just for that.