Delightfully creepy! The beautifully vivid imagery is horrifying in the best way, and certainly created pictures in my head that will stay there for a long time.
I adored the themes of bravery and loyalty and what love really means. Coraline is one of the coolest heroines in childrens/YA literature I've found for a while!
I might not put this out on my shelf of books for my students to borrow, but perhaps just recommend it to those students I know would enjoy it without being too scared.