I think that's the best single word description of the film Never Let Me Go: disturbing.
It starts out all British boarding school and grows slowly... mysterious... then slowly, creepingly, gets horrifying and sad and disturbing. This one may haunt me a little. A subtle love story set in not-quite-our-world. One that's wind-swept, rumor-filled, and very very cold. Scariest quote, "We had the answer to a question no one was asking."
I strongly recommend this film - but whether you'll like it? I'm not sure I do. But I'm glad I saw it.