A solid 10, at least until I see the original foreign production.

Rating: 10/10 (10 May 2015)

I think that it is a mistake to do like I did and watch this movie well into the early morning hours right before going to bed--it's just too psychologically disturbing, or at least it was for me.
With regard to the performers, while it doesn't seem like that nice a thing to say coming so soon after Robin Williams truly tragic demise, his real forte was playing seriously creepy guys, as he does so convincingly here.
Al Pacino, whose normal mode is painful and ridiculous overacting, restrains his natural inclinations well and turns in a great performance, one which really captures the claustrophobia of his character's situation.
Hilary Swank is also at the top of her game, and Christopher Nolan as the director creates the perfect mood for this unsettling film.
The only thing that might bring this down from a perfect 10 is if I get the chance to watch the original foreign movie on which this remake is based, since experience tells me that it will almost certainly better yet.