This is the movie that started all the other "snake" movies - decent effects, memorable one-liners and death scenes. Make sure you look for the John Voigt wink at the end.
I love Stallone's Judge Dredd from the 90s, but it was camp all the way. Karl Urban's Dredd has a different tone entirely - serious, gritty, stylish. Give it a chance and you'll probably like it. My only complaint is that he doesn't remove his mask even once. I know the Dredd character is known for that, but not even once? Karl should have at least asked for that small concession.
If your a Jason Statham fan, this movie is for you. Decent acting, OK story, and great action. The only possible downside is Franco - he seems confused on how best to play the baddie. Still, it's not enough to ruin the enjoyment of the film.