I'm not a fan of 3D films, but this worked particularly well. If you suffer from claustrophobia or vertigo, give it a miss or watch in 2D only.
It's a fantastic experience.
The definition of cinema (a moving picture) expertly exemplified.
A 'heist movie' with a difference, about the improbable exploration of the subconscious, that I find myself compulsively drawn to watching.