The exact same message was posted on the AGS forums. This is shameless spam. Writing a design doc is not as difficult as this company presents it to be, and nobody needs commercial "pro software" for that. There's a very well written and FREE game design document template written by Chris Taylor.
http://www.ihfsoft.com/designdocuments.htm If you need help making a design doc, download that file and don't waste your money, guys.
Btw: There seems to be a lot of stickmen related posts in here(not really but thats my standard message for every forum). Fortunately there's Stickman Designer Pro! It will guide you through the very, very, VEEERY complicated process of drawing a stickman!