Beautifully animated, flawless even. And long! the quality doesn't deteriorate throughout either, it gets better as it goes on. The colouring style is quite simple, but it fits very well. Even if this is quite a lighthearted kind of animation, it has a strong aspect of cinematics to it, it's great.
I wasn't fond of the song and I agree with Ooooo336 about the sounds, which is why I'm giving an 8. But this is a great animation, well done.