a few quick points to know about this series to help gauge whether you want to watch it.
1. The anime is not the manga. so don't be disappointed. given the ongoing status of the manga series (which is highly entertaining) and the need to adapt for anime format, the story has undergone a few significant changes that give it more of a sense of resolution than the manga does. so know that you are watching a different story (and different style of art as well - looks more like Bakemonogatari than the manga).
2. While not the manga, the anime version is still quite entertaining and enjoyable. Dance, while certainly just another vampire story, does a good job mixing up the modern and the typical cast of mythical characters so that one doesn't feel like this is Blade redux. While not groundbreaking story work, i found myself pretty engrossed. the role of the Werewolves is pretty sweet.
3. as you can tell just from the cover (and more so from the opening credits), Dance plays up the loli theme pretty directly. While tame by other loli standards and not a deal breaker by any means, for those who might be uncomfortable with content of that sort, this would be good to note before investing in watching. I found it tolerable, though i had a few uncomfortable moments. and, generally, the content is pretty edgy. which is fine if you like that, but might be a turn-off if you don't.
overall, i recommend with the above warnings