México's tradition of rural and norteño towns is explored in this fabulous movie. Tiaré Scanda, one of Mexico's best actresses delivers a funny and very alive Constitución (Constitution, yes, that's her character's name) While Erika de la Llave's Gloria is not half bad. The screenplay of this film is very brilliant; one can see the work done between the director and the original book's author (they are both credited for the screenplay). The direction is one of it's most superb assets, every actor in the film (specially Scanda and de la Llave) deliver a excellent performance, very well fitted into the film. Maybe it's only failure is that is has some minor technical flaws, such as some inconsistencies in the sound editing and in the timing of the image. Still, those mistakes are forgettable in the context of this funny and brilliant movie. If you are in the US and want to know a little bit about how Mexican "pueblitos norteños" (northern small little towns) are then go and see Una de Dos, if you are elsewhere, I still promise you a good laughter