I've only gone here for lunch but it is definitely one of my favorite places to go if only it were a little closer to ASU. They do have a small private lot and there is also a small lot across the side street as well as street parking.
Your meal starts with the standard chips and salsa. I wish the salsa had a little more heat but it's still tasty. For the meal, they have a good selection of tacos and you can mix and match a plate of two or three. The duo plate ($7.50) is a good portion and also comes with a small greens mix with crumbly mexican cheese (can't remem the name).
There is more to their lunch menu than tacos but I stick to what I love so that's as far as i usually read. One friend had the picaditas (crispy corn cakes) topped with carnitas ($2.50 extra) which came with two cakes and was quite filling.
The service staff always seem to be cheerful and helpful also.