I just visited last night, 2 years after my first visit.
I really like this place...it's not the finest cuisine, but the vibe is fun.
The $15 includes a soup or salad (the salad was large, the soup was a small cup)
All entrees set at $15 makes splitting the check easy. For the location and "scene", $15 is pretty good. You also get chips and three dips.
This is the kind of place I would love to bring tourists. It's so funky. Also, the service on a Friday night was great, no attitude even though I'm far from trendy looking.
Don't waste your time. $15 for an auntree of mexican typicla food you could find elsewhgere for $2-4. Nothing special, nothing wow.
Nuch better off with a place like dos burritos or los burritos. The fare is a 3rd of the price and sadly three times better. Hell Benitos might be better.
If you do go, stay away from their bisque.