STAY
The opening makes sure you're awake, and it has some spooky turns throughout, but by using all the signs to let you know it's going to be a mind-trick movie, it falls short with the closing twist. The transitions are amazingly surreal, especially one from an aquariums manatee tank to the outside of a New York apartment, but good looks don't make great movies.
If you pay attention you'll pick up ... not hints, per se, but there are some oddities that a observant, and as the film progresses, anyone, can pick up.
See it if - you like pretty pictures.
Rent it if - you like pretty pictures for a cheaper price.