One of the advantages of chain stitching is that the next piece of fabric being fed doesnt get hung up in the feed dogs. Best not to cut the pieces apart as you go along. I just snip the long line apart with scissors, but I can see where the Gizmo would be helpful. For me its just another toy that eventually ends up in a drawer. However the Gizmo is better than cutting after each piece with your auto cutter. I took Sally Collins class on Precision piecing and discovered the advantage of chain piecing.