The series started out averaged and ended bad. Very bad. The dialogue was repetitive at times (or just incredibly cliche), Kai was annoying, and Artemis/Atmos/whatever turned out to be a very lame villain. It also doesn't help that the final battle kept switching between saving the world and who likes Greda more. Elisa is way better than her.
This was only worth reading to see the regular characters again, LOVED Dorothy & Nanashi's new outfits, and older Ginta & Koyuki. Wouldn't those two be about 20 years by now? So cool. Though it's a shame that Snow wasn't fully shown...