One thing I can say for Baja Fresh is that they maintain excellent standards in all their stores. I first tried Baja Fresh with friends in San Diego who preferred it to Rubio's, and then enjoyed Baja Fresh in the midwest with Mexican friends who gave it their thumbs up for good standard Mexican fare, and enjoy the same quality in Fremont as in Bellevue.
There's a wide menu to select from, with a variety of singlel menu items such as single fajitas for the light eater to combo plates for larger appetites. 3 different kinds of salsa (sauces) are provided that you can help yourself to. I enjoy the brown sauce - mole - (pronounced mo-lay) Service is fast and they bill themselves as quick and fresh, and not pre-cooked fast-food that's sitting under a heat lamp. Food is prepared only when ordered.
All in all, Baja Fresh is "nothing fancy" just good value for your money for standard, pretty authentic Mexican fare.