Decent.
I'm not going to repeat everyone by praising you, so just assume it from my rating. That said, I would like to give some serious constructive criticism.
I've noticed a rising trend of 'music video'-type animations that use one music track set to an animation. This is beginning to become irksome, especially with animations that have great potential like yours. Sound effects seem to be a thing of the past, and they really should not be.
You can have the music be a focal point of the animation without it being overpowering. Watch some full movie trailers - you'll see that they integrate the movie, music, and sound effects to draw you into them. This animation lacked drive, it lacked intensity, because there was no sound track to speak of. When cannons fired, there was no explosion. When dragons spewed fire, there was not a sound. And that, for me, makes it very hard to immerse myself in an animation and accept its characters and story.
So I found this movie lacking, unfortunately, and believe it is overrated. It could be much more if it didn't hold itself back as it does.