This anime gets an overall 7 by me, for many reasons.
First, the story. Now I'm not saying the plot isn't good, but I didn't really care for it. I got bored. My friend is obsessed with Vampire Knight, but me, not so much. I don't know. I guess the whole vampire line.. I'm not sure. I just didn't care for the plot. There was comedy, and it was good humor. But it was one of those Animes that will get you cracking up, but you have one second before it gets serious again.
Artwork was amazing. It had great style and I ADORED the uniforms. The animation was great too. Earns a 9 by me.
Not much to base off of sound. The theme music for season 1 was great, but season 2's was just plain bad.
The characters were given a 7 because I felt like they didn't show to much originality. Now I'm not saying there wasn't any, because there was, but I felt like not all the characters were as original as they COULD be.
Enjoyment was a 7, because I enjoyed it, but didn't LOVE it. As in, I probably wouldn't watch it again.
So overall it was given a 7. It isn't a must watch, but I would recommend it to many anime fans out there.