A thoroughly intriguing if ghoulish premise, some original nightmarish images, and a young director eager to show off his talents make SAW atmospheric and intense. However, the whole thing gets caught in the razor wire of shoddy acting, a sociopath who makes you go "huh?", a lack of engaging characters, and a morass of internally inconsistent details. The bitter taste in your mouth when it's over will not be fear, but instead will be disappointment, that what could have been a smart, original horror-fest turned into such an uneven wannabe.
Wan and Whannell clearly have been influenced by modern horror stalwarts like Seven, 28 Days Later, and The Ring, which results in a stilted form of brinksmanship where the end game is the most memorable gruesome image. Tying the scenes together, much less ending the movie with a tight little knot, is beyond their story-spinning ken this time. However, they deserve recognition for aiming high and for providing an engaging if ultimately disappointing ride.