I am currently quilting a quilt that I have used two layers of QD, I think it is the Select. It is the 80/20 cotton, poly. First time that I've tried doubling the batting and so far haven't had any problems with it. I do pin basting on mine and FMQ on my DM. This quilt will be a more decorative quilt rather than a bed quilt and I just wanted to try double batting since I have read people are using that. Actually, taking a break from doing the quilting right now. I decided to do all over pebbles and it got kind of tedious, although I like the look.