TLDR Review: Don't bother--not even sure if't it's worth a 3 dollar cable rental.
Unsane is a study in how certain people can make mediocre work, have it funded and mass distributed, and have it peacefully go away when it turns out to be unremarkable, not even leaving a blemish on their career.
The movie's main point of interest is that it was filmed on an iPhone. Um . . . so? the basic heart of storytelling--character and plot--will always be more important than how it's filmed. If Steven Soderburgh's main interest was playing with the iPhone idea, he could have easily plucked a better screenplay of the pile of hopeful manuscripts. This movie is pretty disappointing if you saw Soderburgh's Side Effects and were expecting something of that caliber.
Unsane focuses on a young woman, Sawyer, who is settling into a new job in a new city. She's fled a stalker and still remains jumpy, frightened that she'll run into him just around every corner. She goes to a psychiatric facility for therapy, only to unknowingly sign forms to voluntarily commit herself.
What follows it basically a higher-end Lifetime movie. Sawyer is trapped in a hellish hospital written as fairly unsympathetic to anyone who might be in such a hospital for any reason. The patients are played as standard koo-koo extras (violent, laughing and talking to themselves--why do portrayals of institutions never include self-aware people who check themselves in because they're suicidal and want help?) Everyone is consistently unreasonable, from the nurses to the orderlies who seem to think it is appropriate to put men and women in the same collective bedrooms and lock the doors. Everyone, that is, except for the handsome black dude patient, Mark, who turns out to secretly be a reporter.
Mark provides the plot with a good excuse for a hospital to lock up "sane" people: it wants insurance money and spits out patients once their coverage ends. (This could have been the more interesting focal point--the horrors of the American insurance industry. We trust Mark's story until--twist--we find out with Obamacare half destroyed, there is no insurance coverage for mental health anymore, and Mark is just a crazy patient who thinks he's a reporter pretending to be a crazy patient. )
I digress. Instead, the movie plods down more familiar paths. Is Sawyer crazy, or is her stalker now an employee at the hospital? I never hemmed and hawed about whether she was crazy--I always assumed the stalker was in fact there. There have been a lot of stalker movies but I'm not sure I've seen any that really dig into the most fundamental issues that are the most psychologically interesting. That is, man's entitlement to women and how frequently this leads to violence. (I could be wrong, but I could have sworn I read a review of the movie in The New Yorker right when it came out and it erroneously referred to David, her stalker, as her ex-boyfriend, which he most certainly is not and it is blatantly clear in the movie that they never dated and she had no interest in him whatsoever at any point. I wonder if someone corrected them.) He is a near-stranger Sawyer meets when she is volunteering at a hospice and he takes a liking to her. We don't see a lot of the stalking, but it's clear: she doesn't like him that way and he doesn't know her, but insists that he loves her. This last part often appears in stalker narratives whether real or imagined. The love interest constructed to some extent, which is how she can be the perfect love. The construction is easier to deal with than the reality of a flawed, imperfect woman.
How quickly things go from I love you I love you to I'll kill you. Sounds a bit like borderline personality disorder to me--funny because people tend to think of that more as a "female" personality disorder. I think women, when humiliated, turn their hatred inwards more often than not. Men don't sometimes. Sometimes the rejected man turns from "I hate myself" to "I hate myself and you're all going to go down with me." (insert reference to any one of the hundreds upon hundreds of shootings that have taken place in the past two decades.)
The struggle continues on fairly obviously in the movie. Could Sawyer's elderly mother turn out the be the knight in shining armor? No--god forbid and elderly person be portrayed as anything but a victim.
Sawyer manages to get a weapon and stab David when he traps her in a padded room and then there is an extended chase scene. Why is it that in these scenarios the would-be victims stab once, leave the knife behind, and then scramble away in an uncoordinated run reminiscent of a drunk, newborn giraffe? They never think "this person is actively trying to kill me, maybe I better stab them repeatedly in the brain just to make sure they won't get up with a knife sticking out of them and still run pretty quickly after me, because I am, after all, a newborn giraffe." (The only one who ever handled this right was Jamie Lee Curtis, the original final girl: