Is it clever writing or just another Saw rip-off? Is it disgusting or necessary to move the story and the central idea forward? Can you stomach it or would you rather see a more philosophical approach to the whole "choosing" game (psychologically it is interesting)? Can the movie do justice to the central idea or not?

These are all legitimate questions, that have to be answered. But as with other movies that are trying to ask those things, the answers will mostly be lying on your side and your taste. There is another question though too: Do you care or do you just want to be thrilled/scared/entertained? The viewers who wish the latter will take more from the movie of course. But have to endure weak acting and a weak script.