Wow, so I can't say much without going into spoiler territory but my god this movie is fricking amazing!! I rented it on a streaming site because the trailer looked good, but little did I know how amazing this movie was going to be.
Let me warn you, if you are looking for action you might want to look elsewhere but if you are in the mood for a mental workout then this is your movie. Several things separates this movie for other movies dealing with declining mental states mainly the script, acting and cinematography. The script must have been insane to write. Even when the script gets into scientific minutia it is still compelling enough to keep the layman interested.
The acting is amazing! Basically done in a voiceover, Ethan Haslam does the voice of our main character and he is so compelling that you actually feel his sanity start slipping away.
Shot almost entirely in close up I can't even imagine how this was filmed. If any one of these elements weren't 100% this movie would have failed big time. But everything fit into place and made Masking Threshold a unique and genuinely disturbing movie.