Is this film regarded as a classic? If it's not, it should be!

PROS:
+ Totally impressive storytelling method that tricks the viewer by starting out as a mundane, follow-along and transforms into an intelligent and unique dramatic thriller
+ There is a powerful point to the film that reflects upon society's often apathetic views on mental health
+ Once the movie rears its thriller head, the atmosphere is chilling and tense
+ Unlike many other thrillers, there is a perspective element that reveals exactly HOW one mentally ill person could become a _______

CONS:
- The first half of the movie ranges from being (tonally) silly to becoming dialogue-heavy and sleep-inducing
- The weakest link in the film is the lack of appropriate understanding of the main characters' motives/beliefs; a lot of these aspects are assumed until some revelations near the end

I'm speechless. While this movie requires some personal analysis/ponderings to properly reflect on the substances, it became a totally unexpectedly precious experience.

Prepare for some tears. Prepare to reflect upon your own life legacy.