You can watch the vide demo explaining and showing how it works here: 

Features: 

Brightness - Controls the overall brightness
Texture Scale - Scales the texture of the shader
Stroke Distortion - Controls how clean or wavy/organic are the lines
Texture Rotation - Rotates the texture in degrees
Step 1 and Step 2 - Control the different steps in the shader
Ink - Color of the ink or pencil
Paper - Controls the color of the background (also changes the world shader background color with a driver)
Texture Thicknesss - Controls how bold are the lines
Render Outline - At 0 is inactive, at 1 activates an outline when rendered (created with freestyle)
Outline Thickness - The thickness of the rendered outline (from freestyle)