I adore scary stories -- the more ghostly the better -- so I went into The Haunted with high hopes! Right off the bat, it reminded me of the first season of American Horror Story (the haunted house season). It's definitely a teen-driven story; young adult seems to be a bit of a stretch for a target audience. Despite the comparison to Stephen King, it was mildly suspenseful at best.
The high school students in The Haunted experienced a lot of adult situations despite their young age. I found myself tremendously disappointed in the adult characters.
If you're looking for an out-of-the-box thriller or horror, I don't think this is it. It's perfect for those who like a bit of the paranormal in an overall romance.