I don't watch anime
but this sounds awesome. I see you're a Rozen maiden fan too, geez my friend is into elfen lied and rozen maiden. He actually asked me to do a cover of "Hagashi Omoi" that I would be grateful if you would check out (okay, enough self advertising =P).
Overall I liked it, it seems really good, the only problem I had was that some of the parts sounded a bit flat, and the violins seemed a bit too vibrato-y. The music box in the beginning was a nice touch, I guess it has something to do with the anime, but it fit in nicley. Great job.