I have used the press and seal, but did hear after the concern was if the needle pushed teeny little plastic pieces down into the workings of the machine it could be a problem.
If you have a good supply of freezer paper, you can draw out your pattern & cut around where you would like to stitch, then iron this shape onto your fabric & stitch along the edge of the freezer paper, you can reposition the freezer paper a few times before all the wax is melted off, and then I guess you might be able to use that basting spray to hold the shape down once the wax is gone, while you stitch around it.