Its not a machine. Its a board,mat and the magical ruler..Here is their site and they have video demo's.
http://www.quiltcut.com/
The first thing I ever cut with mine was hexagon's. I cut a stack in a flash. It was amazing to me and that was almost 14 years ago. The ONLY thing that irks is having to order the cutting mat when it needs replaced. But they last a long time with proper care. If I'm lucky I pick one up at the Quilt Shows I go to...last one..she was out. =(
Its hard to explain the Fon's & Porter Method of squaring the fold but I will try...
Hold your fabric selvages in your hands with the fold toward the ground. If you notice..when you hold the selvage even there is a ripple in the fold. If you slide the selvage until the ripple in the fold is gone you almost never have the dreaded bow. I almost gave up on quilting until I figured this out. I found it in this book..
http://www.amazon.com/s/ref=nb_sb_no...+cutting+guide