I did not read the light novels and I'm not planning to. I was hopeful in the first volume but the way the relationship developed made me uncomfortable, even though it started out okay. But I'll get to that later.
The art is pretty for a series like this. I like the designs as they are extremely memorable, and I liked the background art as well. However that is probably the only praise I can give to this series. The story makes no logical sense and is incoherent at times, and the relationship that develops between two of the main girls makes me uncomfortable. It isn't the girls love that bothered me (considering that's what this series is based around). It's set in an all girls school with relationship competitions that they take quite seriously, but that deserves its own spot on this review. The two main characters eventually develop an older sister- younger sister type of thing, where the "younger sister" has to obey and look up to the "older sister" and the "older sister" will get angry if the younger one doesn't comply. I know some people are fond of this, which is fine, but I find it a bit toxic and it ruined the entire experience for me. If you want an abundant amount of girl/girl relationships with odd dynamics, try it out. I heard it's a classic of sorts for the genre.
