Perhaps this movie only works if you've known someone with the kind of debilitating paranoia that Alicia (Juno Temple) suffers from. I don't know. All I can say is that I was glued to it from start to finish and I honestly feel that it was masterfully crafted and offers so much more than most people are giving it credit for.
I understand the backlash... it really is NOT a horror movie. But its not a showcase of intangible visual art-house dream-sequence garbage either, which is what I think people might imagine it to be when they read the synopsis. For me, it was never even the slightest bit boring.
If you want to see how mundane situations can be brilliantly transformed into nightmarish experiences for one character, while other characters awkwardly try to deal with it (and often provoke it), eventually watching this dynamic grow to high levels of darkness and intensity, well then this is the movie for you!
I wish more people could look a little deeper and appreciate the many layers and eccentricities of this movie! Like another reviewer mentioned, many of the scenes could be perceived as flat out hilarious. That is, if you can allow yourself to be simultaneously mortified and amused. This movie has the ability to provoke a wide array of CONTRASTING emotions. I've never seen anything quite like it.
It's not a movie for everyone. But if you read this review and still want to watch it, you'll probably think its pretty neat.