As a stand-alone restaurant, I'd probably rate this Chili's 1.5 stars. As one of the few restaurants open at 5am in the airport, my rating becomes much more generous.
The menu is decent and service is quick, that's all you really need to know. On a recent airport trip, the restaurant was full up at 5am, so they seem to be doing good business.
I had the breakfast tacos with a side of fruit. The meal came with two decently sized tacos with scrambled eggs, cheese, and salsa. I'd rate the food as "fine".