Haunting, suspenseful, and gripping. Easily one of the best films of 2008, and of all time. Heath Ledger's final performance is chilling and downright creepy, and it's worth every penny to go see it again and again.
The movie has so many comic one-liners and moments that are tasteful and do not detract from the chaotic, anarchic mood of the film. It is a non-stop roller coaster of thrills, not rising and falling smoothly like some movies, but consistently packing a punch both emotionally and in action.