I really enjoyed it. The music was amazing, the story surreal and funny and yet with many truths, and the actors did a great job. Especially the scene of generations of music waving together - awesome. It then slid into Tarantino style which I didn't mind, either.
I like everything about it except the vampires, just came out of nowhere, no context things that didnt make sense like at first they ask for permission to get into the place, as in classic demon movies, although they did anyways, but I love the colors and how it was shot
I did find them somewhat nicely explained. Not super in detail, but it worked in the metaphor of using music as symbol of identification of groups. They play Irish folk, the black play blues. The vampires want to expand, so they'd like to use the blues to draw more people to them.