The first time I discovered this anime I was excited. The main reason is because it had Morrigan Aensland on the picture, and I really like her on Marvel Vs. Capcom (the game). Also it have only 4 episodes, which is great for me (I really hate long animes. I'm in pain with Naruto, 17/220). Of course, having only 4 episodes makes it an OVA, and as some people say, OVAs have better drawings. In this case it's true, the drawings are really god. The story too is great. It really caught my attention. I think in the end I could compare it to the StreethFighter series. It's not that kind of regular anime we have at bunchs. Even the animation looks different, like with some american influences (very similar to Street Fighter II). The characters are serious, you won't find any jokes or comedy like most of animes have. And it's a great profit.
If you're expecting a serious, short anime, with a good story then I recommend it.

[Please send me your impressions about this review; critiques or notes about my english.]