I LOVE Mexican food, so even average food will probably garner 3-stars from me. I would say this is pretty average. Everything was good, nothing was disappointing (except maybe the tortillas), but nothing was crazy good either.
I will say that while the prices are "affordable", I wouldn't call it cheap. This type of food is not expensive to make nor difficult to prepare, so I think $4.20 for a single taco, for example, is too high. Combinations run about 10 bucks, specialty dishes $12-$15. Expect to pay about $8 at lunch.
Overall, not a bad place to go. I will most likely return if in the neighborhood.