Vellum paper is also popular for paper piecing. I'm working on a quilt now using it and it's a piece of cake as far as ripping. I have some spots in my quilt where I've got eight or more seams intersecting, so I'm not sure I'd want the sheets of Perfect Piecing staying in the quilt. That would be sixteen layers and even taking into consideration how lightweight it is, it would still be too much. I've been documenting my design process and part of it included reducing the number of seams that intersect.