So I decided to watch the first episode after all - and damn, does it feel good when something you looked forward to turns out better then expected.
Seriously, I love it. Utterly, completely, absolutely love it. Love the story, the characters, the music, the animation style(not the K-ON[well, Kannagi, really] faces, but the rough figures), the setting, and the cast.
Also, were I the only one who was 100% sure that Kanata is voiced by Kana Hanazawa after watching the episode but before reading the actual cast list?
If anything, it's not another K-ON! - it's another Aria.
EDIT: Oh, and the OP is ridiculously catchy for a Kalafina song - can't stop humming it.