Really, I mean it watch it, is it a cinematic master piece? No but not is it a waste of your time and it's the only way you'll know the full story. That said, it's well shot, visually good and an interesting idea, however the characters are flat and uninteresting, the whole idea of the constant blind folds could be negated if the characters actually thought about things. What the films suffers from is story telling, it just doesn't really manage it, the flash backs stunt the flow of the film but are needed because with out them there would be no reason for this film to be 2 hours long, they add very little other than to take the tension away. The ending is very much an English essay ending, (you know when you've written enough words do you can end it 'and then they woke up and it was all a dream') answers no questions but doesnt leave you wanting any answers either, you'll just turn it off and carry on with your day.