Definitely not Nolan's best but probably my favourite (at least tied with 'Batman Begins') because I love the Norwegian original so much AND the subtle changes Nolan made with it, as well as what the three stars (Al Pacino, Robin Williams--in his first villainous role, I believe, and Hilary Swank--in probably my favourite performance of hers, next to the downright decadence and naughtiness she displayed in 'The Black Dahlia') bring to the table here. I greatly enjoyed the five short extras on my DVD (a double-sided disc I bought years ago that has 'The Devil's Advocate' on the other side, yet unwatched): a conversation/interview of Nolan with Pacino; 'Day for Night: The Making of...'; 'In the Fog' (which interviewed cinematographer Wally Pfister); Nathan Crowley: production designer; and 'Eyes Wide Open' (which interviewed sleep disturbance experts), which thankfully I viewed before I watched the movie, to enhance my experience.
Greatly recommended to fans of contemporary crime thrillers, regardless of whether you watched the Norwegian original or not. There are enough differences to still make it worth your while as a cinephile.