I've seen it. It was okay, I guess. But the problem is that the series doesn't really start to get interesting until episode... 15 or something. Reaching a wonderful climax around episode 22. Then slowly starts to go downhill again, with a few peaks in between, and then it reaches the beautiful ending.
Hagi/Haji was my favourite character, though I loved most of the 'chevalier' as well. I also developed a fondness for the journalist who appears briefly in the first episodes, but doesn't get a big role until later on. The character of Diva is done very nicely as well. Saya's brothers, on the other hand, I found extremely annoying. Just... UGH!
Saya's character was also portrayed very well. It's wonderful to see all the different faces she has, and to simply watch her evolve throughout the series. Though she still retains the doubt she had in the first episodes, it's nice to see how she continues to build up courage and motivation to fight.
The series had wonderful music, and a plot that could've been a bit better if it hadn't been portrayed so dull those first 15 episodes. I think that they needlessly extended the series to get more episodes, which is a real shame.
If you can't stand blood or slight gore, I wouldn't recommend this series. For examply, there's one scene where a guy's face gets ripped/bitten off, so... Yeah.
However, all the blood and other kinds of weird inflictions can also lead to sad scenes from time to time, where a character (even a minor one) dies and you plainly start to cry because of the sheer drama of the moment.
All in all, it was a good series, but not something that makes you go "AWESOME-O! Let's watch it again!"
That's my opinion, anyway.