I've never heard of this. What an interesting technique. It sounds like the same principle as the gold tear-away paper. I can see where I might use this technique a lot, especially since I'm drawn to the more intricate quilting designs and am not yet quite comfortable trying to do such things freehand - yet. ;)
My only concern would be that the needle would punch down tiny bits of plastic, like it does with fabric lint/dust or bits of paper when paper piecing. I wonder how much of a problem this would be and if it is something to consider. Without checking into it, I would think the plastic might cause more problems down in the guts of the machine over time, much more then a build up of regular lint would be, especially since saran wrap sticks. I'd hate to get a piece jammed up in the wrong spot. Anyone else have any thoughts about this?
~Tiffany