The character design is adorable, the storyline is cute but sinister (a theme I like to use in my work), and the whole look of the film is just so appealing. For some reason I love the noise her eyes make at the end too.
3D animation isn't an area I was interested in myself but after watching this I want to work on my skills and try producing some of my own characters in Cinema 4D to see how they work.
I SERIOUSLY recommend you watch it!... or else... :D