We've visited the calendaria a few times recently. We also shop here occasionally for the produce and some Latino products (tortillas, seasonings, etc). But this review is for the calendaria.
It's basically cafeteria style. They have steamer trays with various offerings. It all seems to be reasonably authentic. We ordered the breakfast burrito (chorizo). That they prepare fresh. It is cheap and huge. Good flavor, too. It is our go-to spot on the way to work when we want a breakfast burrito.