This is a sequal to the series: Wolf's Rain. So this picks up after the end of that one. In a nutshell, usually people would refer to Wolf's Rain OVA with an "Eww, that totally killed the series." If that's all you've been hearing, then you should perhaps give it a chance. It isn't totally evil and bad.
The story itself was a little dull, and the ending... That was a bit obvious after a little bit. The Entire story isn't very sound, or very continuous.
The Art, it was decent. With a bunch of blood splattering everywhere... It was decent. The colors were well done, and the landscape was nice too. It doesn't get a nine because, the battle scenes were a bit more head one warrior type instead of Ninja back stab and jump away. There wasn't too much action, expecially when it wanted to get things done. I felt they kind of rushed things.
The sound. It was good. Not perfect. I didn't get a rush because of the sound. But the music did give to the entire storyline and add effect to it.
Characters. Perhaps one of the better qualities of this anime, and this ending OVA of the series. Character begins to show, and each one takes a different spin on life. There was much character building, and character creation, without all the flashbacks.
I did enjoy it. Perhaps more than the series. It did touch my heart and I was tearing at the end of it.
Overall an 8. It had characteristics of a good OVA section. It showed some of them, but the ending was the worst bit.