People tend to criticize animes for their tendency to extend their duration with fillers or with not so "useful" episodes. The "Attack on Titan" anime is an example of the opposite: it's concise and direct to the point.
This abridgement version of the episodes 1-13 proves that they have managed to go one step further, summing up all of the fundamental elements of the history in a marvelous way. The transitions are smooth, the art and the animation are even more beautiful, the history didn't suffer from the shortening and the emotions remained striking!
I definitely recommend it to everyone, even those who have watched the first season.
Review by EduardoYukio from the Internet Movie Database.