The impressive difference in reviewers' ratings is explained by this film itself: there are people who love to solve riddles and there are people (the majority, let's face it) who are wildly irritated by these same riddles because they don't want to bother to solve them.
So if you're wondering whether to watch this or not, keep in mind:
1) it's not an action movie, it's an intellectual sci-fi mystery with elements of emotional drama,
2) it's like a one-man show, but at the same time not,
3) it's not a direct sequel to Cube, although it can be connected,
4) there will be no direct final answer, but that's the fun.
So if you like to solve the puzzles with no ready-made answers, then you can give it a try.
