This is more of a thriller/Suspense film than anything bit certainly could have become a horror film, but it stops short of it. I know nothing of the real experiments this is based on, but I found out it is based on real-life experiments. It seems more interested in philosophy than suspense though. There is a lot of "Why did this experience happen?" As opposed to what happened. This will certainly frustrate some viewers because the best parts certainly are showing the experiment themselves and those scenes are very tense. Rather than just getting the patients perspective we hear the experimenters perspective in retrospect. This will definitely frustrate some viewers, but I honestly don't understand the low ratings.
The writing is pretty decent, it's well-acted, filmed, and directed. Some of the editing makes it slightly jarring, but on the whole it still works. I came in with no expectations, maybe this helped? I really would have liked more insight into the patients, and a little more on specifically how each character does because we just don't get much information. However, on the whole it was well-done, despite it's flaws, is probably give it a 6.5, it could have been great, but it's still quite good.
The writing is pretty decent, it's well-acted, filmed, and directed. Some of the editing makes it slightly jarring, but on the whole it still works. I came in with no expectations, maybe this helped? I really would have liked more insight into the patients, and a little more on specifically how each character does because we just don't get much information. However, on the whole it was well-done, despite it's flaws, is probably give it a 6.5, it could have been great, but it's still quite good.