Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The 4rth sick twisted edition to Jigsaw's legacy.

Quick review.......SAW 4 is unique in the fact that there is a weird twist.....as it is the only time this type of twist is used. But the film really adds onto the SAW series. And adds meaning to it. You also find out what made the average John Kramer /jigsaw the serial killer. You also witness his very first game. So this film is unique to say the very least.