My experience with Press n' Seal....... I used a fine tip permanent marker to trace my design for 2 quilt blocks, prob 12" blocks. I laid the PnS on my FMQ design paper and traced. I felt if I covered more than two blocks, the PnS would wrinkle up from puddling it under my machine's throat space. The PnS was actually fun to peel off, like peeling skin off after a bad sunburn has healed ! LOL......
I pressed the PnS on my quilt with my hands, it's filmy, but you can still see thru it to postion it where you want your design to fall on your quilt. I did a meandering and an open rose, and it worked well. The only thing I found I didn't care for, was the PnS left a small gummy residue on the needle and seemed to collect midway on the needle. It didn't bother stitching performance, I'd stop and remove it with my fingernail from time to time. All in all I thought the PnS worked great for me, since I needed some direction with meandering & rose design for my first experience FMQ.