I go there frequently - mainly cause it's close to my office but also cause I love it.
They have great Margaritas, and what I love the most is - wait for it - their sizzling chicken fajitas. You can actually share one - it's huge.
Also, they give you tortillas with 2 different salsa and tasty butter as an appetizer - you know how it works.
For waiter - ask for Tamas, if he's there. He's good, really good.
Sinigual - thumbs up!