I love the plot, but there was a lot more to be desired: the story seems unfinished, the characters all have an inferred relationship that never gets clarified, the 7 kings (3 of which never get showed), a sense of mystery that didn't get the proper ending (in my opinion).
They had such amazing artwork, it was so pretty with vivid colors and intensive details. I like all the characters, except, I wish they had a love line in the story (some were implied, but never flourish).
I enjoy it enough but wished that they could add more episode to add more depth to the story, that it well deserves.