A word of caution if you use freezer paper or press-and-seal ... be careful of what you use to mark the transfer. I used a blue sharpie on press-and-seal and when I stitched with white thread, the thread picked up the blue from the press-and seal.
The press-and-seal was also a nightmare to pull away under the stitching. Little pieces wanted to stick and I had to tweezer it all out.