The Gizmo Audio Sawmill is a distortion device with an external Bias control that lets you shape the clipping from an overdrive like openness to a more sawtooth distortion. You can switch between the two extremes with the help of the OD footswitch.
The pedal adds just the right amount of crunch while maintaining the guitar's tonal integrity. It is also very touch sensitive which is great for those who wish to play with dynamics and keep it clean at a light touch and dirty when you dig in.
The Sawmill's creator, Charles Luke, has done a fantastic job with this pedal and it's easy to see why it's been lauded in magazines of note. Perhaps this video will help spread the word and draw the interest of a few more discerning stomp lovers. I think it deserves it.