A Nice Try
I recently played a game called Hard Rain. In this game if you failed at a task, it hand an effect on the story line. This is what Saw the video game is truly missing. Unfortunately you end up trying puzzles over and over again in what can only be described as torturous repitition.
Fighting you all the way are the controls, sometimes the same button has multiple tasks. This leads to many a mistake. Try and set traps on the fly, or even aim a weapon in the general vacinity of the person you are trying to battle.
Most of the game is spent with puzzles, some fun and some frustrating. If you can find this game on the cheap, by all means check it out. However, I would never pay full price for this game.