Ok, here goes:
I liked it. Overall it was a little on the cheesy side, but the special effects were done well, the story was believeable (For a sci-fi/magical type of story anyways) and the acting wasn't half bad.
Your not going to love this movie though. My wife hated it - mainly because she's read Anne Rice books and they apparently weren't very true to the books. Fair enough, I hated a lot of Tom Clancey movies. And when they made Harry & the Henderson's a movie they missed out on 2 scenes! Ok that's off topic, and how do I know that?
I really liked the way that they portrayed vampire fighting. It was very quick, and they used some nice effects. Oh! And I almost forgot, the lead singer from Korn (And most likely the rest of his little crew) played some killer songs on the Soundtrack (the lead in the movie is a rockstar), these songs alone are probably worth the purchasing of the soundtrack. Really good stuff.
Anyways, I'll give it a 6.2/10.