No spoilers here!
I was enthralled through the beginning of the movie, I do think it is an interesting concept. Others have mentioned in their reviews many of the plot holes and things that don’t make sense. I noticed some of those things and had my own questions at the end of the movie. For me, the story telling was unclear when the twists and turns were trying to be explained through visuals and scenes, it took me a while to understand what certain things meant. And I anticipated twists but they weren’t the ones I thought they were going to be. That doesn’t mean that type of writing was bad, in fact having unpredictable story lines is a good thing but the turns were unsatisfying-which is a part of good story writing. There were a few parts that were drawn out and the suspense wasn’t deserved at some moments. But I did care for the main character. Just know that if you watch this movie you won’t really leave feeling satisfied. At least that’s how I felt.
Also, I wanted to note that this movie does not seem PG as it was marked on Netflix. It has an F-word, scenes of wounds, blood, and surgery, and some other things I can’t mention because they would spoil the story. But view knowing that. :)