I give it 2 stars, not through any merit of its own, but, because so much of Hollywood's output is even worse.
Sandra Bullock looks immaculate throughout her rehab process. A process which has the same apparently long serving 'wacky' patients when she arrives see her off at the end, therefore making a mockery of the film's title.
Those patients are poorly rendered, inexplicably random, characters including a German homosexual who cries incessantly, an angry, myopic, self- tracheostomied doctor and someone whose personality trait is that they wear a hat.
It tries to be too many things and as a consequence achieves none of them, including a study into lifting horses' feet.