It really depends on the quilt and its use. I find Polydown is a good polyester batting as it doesn't shrink or beard, is uniform in thickness (seldom has thick or thin places), is easy to unroll (some shred instead of coming apart easily) and can be quilted eight inches apart without any difficulties. It washes well and does not seem to bunch up after repeated washings. Quilts made with Polydown will be a little puffier and won't be quite as flat as those using a cottom bat. I find it a great choice for children's quilts or college quilts that will get a lot of wear and be washed frequently. Polydown is not my bat of choice if I was completing an heirloom wedding quilt for my daughter. I'd try a Polydown bat on a quilt to be used everyday and see what you think. It really is quilter's choice and the $ spent. Polydown will probably be only 1/3rd of the cost (at least in Canada it runs about $5-$6 metre and less if bought in bulk) of a cotton bat. Happy stitching.