The salsa here is the best you'll find at any Mexican restaurant (within or outside of this price range). They also bring you free chips and salsa as soon as you sit down, which is becoming less common - so very much appreciated!
On their nachos, they ask if you want shredded cheese or nacho cheese. I always opt for nacho cheese, because what's the point otherwise? The nachos are good, filling, and reasonably priced.
But what really makes this place amazing is their bean and cheese burrito. Such a simple menu item, but SO delicious, especially with their salsa!! I take the bus into work, and I was tempted to drive in just so I could pick up another couple burritos! It's a newfound obsession of mine. No wonder Juan's is always packed... go check it out!