So, this show is about pretty fun (not overly cool) fight scenes, a little bit about helping other people, and a lot about the love between the two main characters.
I was actually moved by the love Shu and Inori had--and I don't think I've ever been moved by a show, movie, or anime's love bond, but theirs was just something special.
The show is short; yet, it is easily just one of my favorites and I'll always keep it in my collection for another go-around in the future. I will say, while the last 11 episodes are packed with more action, the first 11 episodes are better, and I strangely think the last 11 could have been summed up quicker--that's not to say they are slow, for they move faster than the first 11, it's just... well, you will see.
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That being said, I really didn't like the ending at all, and to me, it's the ending that really makes me want to re-watch an anime. Still, I'd never give a show a 9 if the ending was bad, for it'd be a 7 or lower, but I really did enjoy it. Not to mention it's just beautiful animations.
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IN SHORT: if you haven't watched it, do it. Set aside a week and just enjoy a few episodes at a time, and try to live in the relationship between the two main characters. Also, be sure to listen to the intro song for the first 11 episodes--I must have listened to it dozens of times.
Plot: 7/10
Music: 8/10
Characters: 9/10
Animation: 10/10
Overall Impression (I don't do averages for impressions): 9/10