I'm from Hawaii and as such, please take my opinion with a grain of salt unless you as well are picky and spoiled when it comes to Hawaiian barbeque.
I've been to three places for Hawaiian bbq while in Arizona, and Ono Hawaiian is definitely the worst of them. The fact that is it a chain first raised red flags, although I knew this fact when I decided to come.
I ordered then curry chicken katsu and I was horribly disappointed. The curry was more like water-with-curry-flavoring. It was watery and instead of adding flavor, like curry is supposed to, it made my rice mushy and my katsu soggy.
If you want good Hawaiian BBQ, go to Aloha Kitchen, run by a local Hawaiian family, in Mesa. It's a drive if you're close to Ono Hawaiian, but it's absolutely worth it and reminds me of being back in the Islands.