Keep in mind that the premise is absurd, and normally the scores I give on this level give a lower score normally. The background music ranges from awful, to extremely cheesy, to boringly generic. I like the art, but nothing outstanding. The story, while creative, isn't enough to have me give more than a 3 in story.
I rated the character and enjoyment factors to be a 10, the cast is likeable and enjoyable, from random loli Athena, to greatest waifu of all-time-ever-no-bones-about-it Erica (Fight me m8 if ya disagree :P) to a protagonist that makes me rage like Godou (but at least I care enough about him) to the white haired knight girl.
The reason I'm scoring so high is the absurd levels of satisfaction in the climax of the relationship between Godou and Erica. I rarely get the level of romantic satisfaction I want out of an anime, let alone an ECCHI HAREM anime. The last episode is garbage mind you, as I could care less about Athena's weird identity crisis.
But overall, it is fantastic because it maximizes its genres to the fullest.
Oh yeah, and I never got to see the identity of that Soothsayer Alice.