We have dined at the Old Town Tortilla Factory several times over the years and as recently as two weeks ago.
The outdoor seating area is very nice, there is a roomy bar and fairly large indoor restaurant (I agree with Sarah K., bring a sweater).
The Chorizo Fundido is delicious!! They serve it with a large bowl of chips. I always ask for a side of soft corn tortillas too, they are a nice change from the chips.
The Plato Appertivo is gigantic, you could feed four people with this thing. The nachos, ribs and quesadillas were all fantastic. There is a generous scoop of their great guacamole on top and a bowl of salsa on the side. You might want to ask for the chipotle sour cream on the side rather than on the quesadillas - it has a great smoky taste but can dominate easily so I prefer to regulate the portion.
The enchiladas and soft tacos are very good. Their flour tortillas are great (when they bring them).
Margaritas were excellent and generous for the price.
Service can be spotty. If you're in a rush or are frustrated by slow service to the point it impacts your food enjoyment, this place may not be your cup of tea. I enjoy the food/drinks so I go when I know I have the time to be patient. Test it out during a leisurely happy hour and see what you think.