I like horror movies. Something on the attempt to make the audience scared makes me curious to see this kind of movie. That's not the point in "Let the right one in". Somehow this is what makes it so unique.
Oskar is a sweet 12 year old boy that is very lonely and it is constantly humiliated and bullied by classmates. The story revolves on his relationship with a new neighbor: a 12 year old mysterious girl called Eli. She is a vampire and eventually encourages Oskar to stand up to the boys in his class.
This movie is special in so many ways. First you can see the changes happening in Oskar becoming more comfortable with the idea of revenge. Also there is the relationship between Eli and her "father" Hakan. I'll not discuss here all the possible meaning of Eli's relationships but it is suffice to say that it keeps you wondering.
In addition there is the constant fear from Eli that Oskar will reject her. Initially the viewer may think that is only because of the fact that she is a vampire but there is more. You can see her confusion and fear in the scene where Eli enters into Oskar's bedroom by the window and when they talk, she says that she is not a girl. It is very sweet and emotional.
The other two awesome scenes (this time for a much more gore fan) are the scene where Eli enters Oskar's home without being invited and the final scene at the pool. At the end of both situations you can see Oskar's sweetness surfacing again.
The movie has very beautiful scenarios and the sound is something else. I'm not talking about soundtrack. Watch it with the volume high. The sound effects in most scenes featuring Eli increase the perception of the film.
Overall, I think that it is a pity that Eli's past is not explored. But it doesn't compromise the movie at all. To me, "Let the right on in" is a masterpiece. Watch it at night with the lights off just to create a more immersive experience. But under any circumstances, this movie is a 10.