Generations and generations have come to this place just to have a taste of its delicious churros, it is a MUST place in the city. If you are tired after shopping all day in downtown streets, you can come and eat something very tasty (in cold winter it's even better)
Traditional mexican atmosphere, centrical ubication. This is a nice place for having a short dinner at night. The staff is fast and friendly. You can also have some sandwiches on the street if you're in the middle of a busy day.
The place is located next to San Juan de Letran subway station, so it's a very crowded area.