Let me start by saying, I thoroughly enjoyed this film, as in my opinion, it did everything right. Sure, it had no real substance of a story line (hence the 8/10) but that didn't take much away from the film. The simplistic story also had its advantages, as more time could be dedicated to Dredd doing what Dredd does best, instead of messing around in lengthy conversations. Besides, a detailed emotional story might have made this film a flop, as the cold, ruthless character of Dredd would have been somewhat diminished if that had been the case.
So what made this film for me? Simple, the fact that they weren't afraid to make it an 18. This lends strong evidence to the argument that if you want to make an action film that raises the bar, it has to contain all of the shots that just aren't allowed in a 15 rated film. The drug, SLO- M0, that is used by the junkies in this film to slow their perception of time, allows for stunning, and brutal, scenes that also look great in 3D. The 18 rating also allowed for the director to create villains that you despise and you can understand why the other innocent characters fear them, which engages us as an audience.
The film's script is cheesy, but if you've seen the other Judge Dredd film, that'll hardly be a surprise. And I must admit that Karl Urban does a fantastic job of making the lines still sound good. And overall, the acting is good, which is a relief after seeing so many action films where even the main character can't act..
Overall, a great film. Possibly not the best film to watch on a first date, but if you know what you're getting yourself in for and just want some entertaining action, I really don't think Dredd will disappoint.