La Salsa

Definitely a step up from Taco Bell but a step down from the "real" Mexican restaurants in the area as well.  As their name implies they do provide unlimited salsa and I think their salsa is quite good.  Most of their dishes though are quite pricey even for restaurants within The Union.  
Their burritos are quite good but I still prefer Chipotle's for the price; their nachos though are quite excellent and La Salsa will give you a heaping portion for very cheap.  Combined with their salsa the half-portion nachos make for an excellent meal for any student.  (one annoying thing though sometimes they ask you if you want meat on the nachos - what they don't mention is that it costs extra money)

This place is a step up from taco bell, chipotle, qdoba, labamba and a step or two below the good authentic places that this town has to offer.

The food is good, semi-authentic mexican that is a bit on the pricey side.  They have a good selection of salsa's at the salsa bar.  I've had their "mexico city tacos", which are tacos al pastor, mexican style; their burritos, carnitas, quesodillas, taco salad and nachos.  All are fine.  I eat there a lot because it is close to the office and I'll take pretty decent mexican over most other kinds of food any day.

They are a bit pricey, but if you get the nachos or taco salad you'll have enough food for a couple meals.

My biggest complaint with the place is that their meat is always less than hot in most dishes.

3 stars compared to authentic mexican places, more stars compared to most other restaurants on campus.