First off, the score i give for it is high, compared to the average, but I got reasons
The story is that it follows the lives of a brother and sister, one being a monster that eats human flesh, while the other has insane healing powers. Not the greatest, but definitely not the worst. It excels in being something different.
For the art, its not great, but for a 4 minute animes, it is leaps and bounds better then Chitose Get You! and Sparrow's hotel. You can't really compare 1 5-min anime to 24 minute animes by Bones, or Trigger.
Sound: The chewing is unsettling and the OP and ED's are good.
Character takes a hit, just because of the run time. Can't flesh out a character.
Enjoyment is high just because of the premise. How many other animes are their that have cannibalism as a theme?
In conclusion, the scores for this animes are horribly underrated. This anime coming out is a feat, as it deals with cannibalism. Its 4-mins long, and will have 12 episodes. 48 minutes isn't a long time. Try it, and you may enjoy it.