I haven't varied much from traditional "American-Mexican" cuisine here (tacos, enchiladas, soups, etc.) since I wasn't sure how well they would do with authentic Mexican fare. However, they do the basics so well, I am thinking I need to be more adventurous now. They seem to be pretty generous with their use of chili powder in the sauces, which I love.
Plus, last time I was there was on a Sunday afternoon, and it was almost packed full with mostly Hispanic customers, which is obviously a great sign of the food authenticity! (keep in mind, this isn't exactly Buford Hwy)
Love the place...nothing too unique, but consistently good!