This is a spoiler-free review.
This movie's ending (which I will avoid spoiling) is EMOTIONALLY GUT WRENCHING. Do NOT spoil this movie for yourself. It is best watched without researching ANYTHING. Moving On.
This movie marks the return of the Dynamic Director-Actor Duo Martin Scorsese and Leonardo DiCaprio, which is always a good sign, what with Inception among other movies.
From the get-go, the film seems visually stunning, with one of the most amazing filming locations I've ever seen. The time period of our setting being the 1950's, everything fits in : The medical practices, the clothes, the language used ; it's all meticulously crafted into one hell of a story.
Our Main Character and Protagonist, played by none other than Leonardo DiCaprio, is a U.S. Marshall and Ex-WWII soldier with a tragic backstory. He is sent to investigate a case involving an escaped patient at a Mental Institution for the Criminally Insane, accompanied by his partner "Chuck".
However, he gets suspicious of the establishment, making discoveries, alongside his partner, that there is something much bigger than just housing for the mentally unstable. This leads to one of the most divisive, and genuinely amazing, endings I've ever witnessed. I can only use one comment to describe the ending without spoiling anything :
That twist will hit you so hard you could pass for a pack of Twizzlers by the end of it.
The script is incredibly well crafted, taking into account every detail that will lead up to an amazing finale. Every single scene in the movie offers something to the ending. It is truly one of the most remarkable executions of a storytelling I've ever witnessed. Even things you would believe to be pointless and thrown into the film just to make sure people expecting an action movie don't nod off, comes back full circle.
As for the plot's believability, it's crafted well enough to pass, but that would only be the case were it set in modern times. This movie is set in the 1950's, which changes everything in this movie from "Hardly Believable" to "Completely Plausible". The suspension of disbelief in this movie is used to it's maximum potential.
The Characters are built perfectly for the story, which only makes even more sense towards the ending.
And the final line of dialogue in the film is one of, if not the most, impactful line of dialogue I have ever seen delivered. It was done in such a way, that it only increases the questioning you had about the twist ten-fold.
The cinematography and lighting is ON POINT ! As well as the effects in the film. (Albeit a few cheesy moments in the dream scenes, but easily forgivable due to it being, well, a dream scene)
Overall AMAZING movie. When you can make something unimportant become important at the most crucial moment of a movie, and have it make PERFECT SENSE, you have my vote.
As a closing statement : Inception's ending ain't got jack on this.
If you don't like the ending, that's fine, but you have to give it credit, it'll leave you blown away for 30 minutes to a few hours, depending on how hard you take it.