Given that there are already over 200 reviews for this place, I doubt I will add anything of value. That being said I love this place and would like to support it's fantastic food and service in any fashion possible.
I've said it in other reviews, unfortunately there isn't a depth in diversity of dining in Madison. This is one place that helps solve this issue. Taqueria Guadalajara offers authentic Mexican food in a laid back atmosphere and with warm, friendly service.
As many reviewers have already elaborated, this place is packed at peak times. Luckily service is so fast that waiting doesn't exceed past twenty minutes per party.
When I do go here, I have a tendency to order the same thing over and over again, the steak chimichanga. I see a lot of people order variety though, including a various assortment of foods with Verde sauce, breakfast, etc...
All food is made fresh and to order. This is a point of distinction between this taqueria and others in Madison. A clear example is that the steak is made for burritos, tacos, etc. in small batches to satisfy the orders needing steak. At other places, the steak will be made every few hours and will be allowed to sit around. This makes all the difference in taste of freshness and providing restaurant quality. The produce is also prepared in fresh as well every few hours. The tastes are very reflective of going to a classic place in Mexico and asking for a particular food.
The price, friendly staff, and great quality simply has no rival in Madison.
Oh and they also have Mexican cokes, horchata, Jarritos, and a few beers for selection - a nice touch.