Manages to work in the vampire mythos without any of the camp of melodrama that usually smothers the genre.
The pacing is perfect - although slow - there's a brilliant cold stillness to everything.
The special effects are minimal and believable.
Some really tender moments in amongst the chill.
The nearest movie i would compare it to is George Romero's Martin. But that's partly because there needs to be more excuses to mention that film.