The beginning and middle were well done realistic, and had a great plot and acting it the end was terrible. It was so far fetched and unrealistic. They should have included more facts from the real story and not make the ending so grandiose and overly done (tha scene with the daughter, and older son, doppelgänger part) that it took away from the reality that exorcisms are. Sometimes simple is waaay more scary than over the top.