They are really good books, and I really think you should read them. It's not like Twilight, which is more for Pre-Teens and under I suppose. This one is a bit more Young-Adult, with a bit of explicit language, and drama being it's main genre instead of romance. It has stuff like alcohol, and sex, though the scenes aren't all that explicit.
I myself like it more then Twilight, but that's more because it's my type of book. And I'm thirteen, so it's really up to you to decide.
You could read the first chapter on the Main House of Night Webpage and see how you like it;
link