Dredd really is done well.
We get a really nice early sequence in Mega City One, post apocalyptic America, before the movie wisely confines the bulk of the action to one of the massive mega blocks - blocks are towering high-rises that contain thousands of residents and each are like mini cities within the larger city.
Dredd's certainly a tough sell - on the surface he may seem like a superhero, tailor-made for the Batman and Avengers audience, but that is not the case. The Stallone movie made the mistake of depicting Dredd as a square jawed hero, but this time the movie Dredd is very much the fascist tool of the state that the comic book invented all those years ago, and Mega City comes across as grimy as the 1970's UK that first inspired the initial creation of the character.
Let's hope Dredd does well enough on DVD to inspire a sequel. The film certainly deserves one but next time forget the 3D.