The characters are annoying. At first I kinda liked Yuki and Zero was kinda badass. But then slowly within the first 10 chapters it spirals into shitty melodrama and anything that was likeable about any of the character is GONE and basically the manga is almost unreadable now.
They basically killed Yuki's character for me since her current 'revelation' and Kaname is the worst character I've ever has the displeasure of having to read about.
It's not good. At first it might seem good-- but the anime is only going to continue to follow the manga and as I've already said, it turned shit quick.