This Uruguayan film falls squarely into the 28 Days Later category of fast zombies. It seems that the people who made this movie took ideas from other films, but tweaked them enough that I wouldn't consider it a rip off. Regardless, this is a worthy entry into the genre. It only takes a short while to take off, but then it never stops. Lots of eye catching tracking shots, and while it takes place mostly in a darkened gym, you can see what's going on. Well directed, edited and acted, this was a fun watch. Highly recommended.