Meh.
I, personally, didn't really like this. The characters were well-developed, of course, and it was nice that no one was all evil, or all good, and the plot was original and obviously well thought out.
But I didn't like it. There was too much angst, for one thing-- plus, everything always seemed to go horribly wrong. Loads of people die, it's very bloody, and it can get very confusing as to who's who, and what the heck is going on.
(And there's the fact that the art is horribly old and awful, everyone's shoulders are insanely broad, and you can't tell the girls from the boys at all. ...It does get better as it goes on - much better - but I really can't call it 'good'.)
And I really felt what romance there was developed entirely too quickly and randomly. Admittedly, this is marked as a shoujo, so I probably should have expected that, but it just seemed strange, when all friendly, enemy, and other relations were so gradually developed, that...
Shuuri and Sarasa should fall completely and utterly in love after, like, three hour-long meetings in the hot springs.
It just feels off.
I'll finish it, just because I hate to leave something undone, but I certainly won't re-read. But maybe it's just me - loads of other people seem to really enjoy this series, so perhaps you shouldn't take my word for it.
[color=red]EDIT:[/color] Okay, so I just finished it. ...And I'm still confused. Not to mention that it felt like this dragged on forever; I kept waiting for it to end, and it never did.
The characters were very good, though, I'll have to give it that. And it was certainly a very creative and unique plot.
...But I still most definitely won't read this again. Once was enough.