I've used blends with polyester many times & with a mixture of cottons in the same quilt. I have never had a problem & I've made about 60 quilts-mostly easier ones just because I don't have the patience for the very beautiful intricate ones-and I don't see puckers or uneven shrinking or any other problems. I would be in heaven if I were to find a bunch of fabric for 1.00 & wouldn't hesitate to use them. Happy Quilting!