I quilted a "show" quilt for a customer using Pellon Legacy 80/20 with scrim on the bottom and Poly on the top - turned out beautifully! Her applique looked like faux trapunto. iIcan't post any pictures as she hasn't given me the go ahead yet.
I didn't have any problems (and I quilt ALOT of quilt for customers) and am sure I will do it again in the future.