My own experiences
I couldn't relate to a lot of the stuff they said about the sleep paralysis in this movie. The whole "prayer works" was just bunk from my experience. I have also had it less and less as I have gotten older. My last one was over a year ago when I was swamped with work, a break-up, and financial stress.
I could usually tell very early in the evening if I was going to have sleep paralysis that night (though i could have just been psyching myself out). I would have had a nap earlier in the day (due to poor sleep) and woke up with a "hazy"/buzzing feeling which didn't go away. Then when I got to bed at night to actually sleep, the buzzing would intensify, I'd go numb, pressure feeling on my body would happen, difficulty to breathe, and an intense feeling of dread would overtake me. Once or twice I'd seen the so-called shadow man from the corner of my eye, but typically it was more of a sensation of something being in the room.
One night I actually woke up after hearing someone fall down the stairs (all in my head). These episodes were much more frequent in my early teens but have since subsided into my late twenties.
I also developed a coping mechanism after i started seeing the shadow man; I began sleeping either on my stomach, or under the sheets on nights that I thought I would experience this. I also learned to jerk awake and adjust if SP ever caught me on an unexpected night. These coping techniques never stopped the SP,but prevented me from seeing anything.
I was very relieved to know that there is a medical explanation (obviously demons wouldn't be very pleasant to deal with). My friend's cousin isn't as much of a skeptic about such stuff as I am, and he is convinced that one night his late grandmother climbed out of a picture and climbed on his chest and began to bite his neck bloody. And i think the danger of this documentary is that it leans too much toward the supernatural explanations of such experiences and doesn't try to balance it out too much with "it is all in your head". I will file it under entertaining/kinda-scary/hokey.
On a final note, I have shared my SP experiences with many people and they have never "caught it".