I definitely give this place A on location and atmosphere, as you feel as if you are in Guadalajara, so it feels very authentic, and I would say the food is fairly authentic.
The salsa was okay, and I am a big salsa fan, so that didn’t wow me. Other than that, my enchiladas were great, and my wife's fajitas were above average. In general, that whole "market place" is a neat area and worth going to. We took a street car to get there. You will spot it quickly, or probably hear mariachis doing their thing!