With what indeed seems like a lot less budget, the conditions in which "Un Buen Día" came to be find an amazing resemblance to the ones found in Tommy Wiseau's "The Room"; a totally unprofessional movie, with shameful performances in the main roles leaving any mildly good acting to secondary characters like the ones played by Andrea del Boca here, or Greg Sestero in "The Room" - and last but not least, a stubborn, rich sponsor who insists his movie will be a dream come true and will stop at nothing to achieve such a thing, even if that means making a lousy movie in the end.
"Un Buen Día" is infested with pointless dialogues that fail to tell the audience anything important about the main characters, elongating the plot beyond any measure. It is absolutely confusing, and often treacherously reflects the writer Enrique Torres' political opinion directly into the characters lines but without any valid arguments, let alone having those lines anything to do with the already boring and pointless plot that rarely finds its way out of the simple "dude wants to get laid with girl" idea.
Just like Wiseau's movie, Enrique Torres' "Un Buen Día" is a movie intended to be entirely serious, but ends up being comedic; if anyone is interested in watching the whole thing through, it is because so many horrific details can make the viewer explode into laughter. Maybe, just maybe, this has a shot to become a cult classic like "The Room", but until then, I'll judge it for what it intends to be, and from that point of view, this movie fails miserably.