It's inauthentic, campy, unimaginative....but, you could do a lot worse. This is leagues better than Don Pablo, Chi-Chi's (Hepatitis A, anyone?), Baja Fresh, Qdoba, and even Chipolte. As noted by fellow reviewers the service is a strong suit - friendly, attentive, and seemingly always in a good mood. The lunch specials are a good deal as well.
So with the right approach - i.e. don't go buck-wild ordering the enchiladas de mole and expect Rick Bayless to magically appear on your plate - this isn't a bad option. Just relax with a Dos Equis, some nacho cheese over a burrito, and a couple of churros and everything will be ok.