I don't think you can find a higher quality quick service chain restaurant in the US.
Rubios consistently provides a fresh, flavorful product and the service is always top notch. My go-to is the grilled gourmet steak taco plate which comes with rice, chips and tacos are filled with a layer of grilled cheese, avocado, bacon, cilantro, onion, steak, and a chile lime sauce that's phenomenal.
My wife rotates between a couple different salads and a few different shrimp tacos and enjoys them all.
On top of this, there's a fresh Salsa bar and they have great mango iced tea. I may eat at Rubio's more than any other place in the area. I'm definitely a regular.
Also, their Manager Lorena is fantastic.