That was a long one...
Well it can't be a horror movie because the hero is also the murderer, and the murdered one is simply a ahole, so most people won't relate with him.
If you really haven't seen all of it, it's a damn shame. ending is freakishly expected, but weird.
The technical aspect is amazing. from effects to scenery and clothing. the music sometimes overpower the actual words, but the musical part is actually not too bad.
It's nice seeing a man mourns with a song, and the fact they keep it nonstop is better than just the occasional and inappropriate singing.