La Corneta is pretty much the only decent budget place to eat in the Glen Park area, which is why you can expect the line to be about 20-30 people deep at any given time of the day. But the line actually moves quickly and for the great food, it's worth it. Prices aren't as cheap as in the mission, but I think quality is a bit better. With burritos, you can choose the type of tortilla you'd like (spinach, etc.), types of beans, and there is even a vegetarian option with tofu. Carnitas are great as is the seafood, like prawns. They even have a ceviche tostada. A huge plate of nachos with beans, cheese, and salasa is only $3.50! Only complaint is that while agua frescas are cheap, the cup sizes are way off. I had to ask if the medium size was correct because it was so tiny! Is the small the size of a dixie cup??