Whether it's the story, the characters or the soundtrack Chrome Shelled Regios wasn't able to surprise in no moment at all.
The story is quite simple and it could have actually surprised if it was well managed. However, the excessive focus on unimportant things made the anime lose track real soon. The Heaven Blades were just for decoration, the "engrish" side story made barely no sense at all and the way the things were "explained" all in a rush in the last few episodes was far from being satisfactory.
The art is decent, at most. The character design annoyed me and the sceneries had nothing special to it. The action scens are quite lame, too. The soundtrack was the best part on the anime, even though it was miles away from being remarkable and it sometimes felt out place.
The characters is where this series could have saved itself but it ended up being its doom. Besides from Layfon, Sharnid and Nina the other characters had barely no development at all and all acted like perfect cliches. They just kept popping here and there for no particular reason.
Overall there's no reason I can see to recommend this anime to someone, it's just not worth the time.