Haven't seen this yet but probably will.
The Swedish movie is essential viewing, but don't forget the real source material, the novel. The first movie is quite faithful, but inevitably a lot gets left out when a novel is turned into a movie. It's well worth reading.
One point that I understand the American version changes... I gather it makes the main character more of a normal kid. That would mesh with the idea that he's an innocent being manipulated by the vampire, but the thing is, he's a disturbed and creepy kid in the original before she comes along. No manipulation necessary.