It's the name that drew me in - Mia Wasikowska. That, and the film's title: Stoker; as in Bram Stoker. And despite the film's undeclared namesake and any allusions to what such a name brings to mind, this film was not horror in the usual sense. Psychological yes, but not horror. We can thank Ridley Scott for this. Were a lesser producer involved we would have gotten all that. What makes this a good film has nothing to do with the virtue or lack thereof of any character. Clues are scattered throughout the film which come to semblance of fruition at the end... you'll still have questions, but expect them to go unanswered.

All in all, Stoker is decidedly clean, considering. 

Final note... Everything you see in the photo is there for a reason.