I have a feeling the food will be similar to that at other celebrity restaurants.
It will be good but not amazing and slightly overpriced relative to other restaurants of similar quality. You probably won't have a bad experience with the food or service, but after paying $14 for a burger or $13 for a shrimp po-boy you will probably just go somewhere else next time.
A lot of their customers will be tourists or curious locals who only go once. Business wise it will probably be a success.