I've learned that you don't have to watch something excellent to enjoy yourself.
To be blunt, the show was overwhelmingly average in every aspect apart from the art/animation, which was quite nice, including the colorful fight scenes.
The character development was alright. For a harem, there's actually quite a lot of development for most of the characters, especially Tohka, the main spirit. The characters also each have their distinctive personalities, and without spoiling anything, it's pretty safe to say that all of the girls don't act the same way. In the end, though, the plot fails to break the classic harem mold, and puts in those obvious "accidental" scenes where conflicts occur for harems - it was enjoyable, but predictable.
Yet, despite all of that, it was.. interesting. The plot takes a serious issue, the issue of saving the world, and mixes it with dating-taken-to-the-max-seriousmode- despite dating being a normally lighthearted event.
The result is a comedy that becomes serious at times, but mainly stays light and cheery the entire way, similar to something like Kore wa Zombie Desu Ka. It results in an actually really enjoyable anime, even while being somewhat predictable. That's not to say there aren't slight plot twists, but for the most part, it doesn't try to stray far from the path.
It's not a masterpiece, but rather just an enjoyable anime with an interesting idea, that gets somewhat hurt by its predictable plot. Overall, those who enjoy general romantic comedies/harems would enjoy this as well, while those looking for a really deep plot wouldn't.
