I just finished quilting 2 layers of dream cotton in a scrappy quilt on Bernina Artista 170. I went with two layers of batting because the single layer was so thin and used a donated polyester blend cotton for the backing. (Quilting for charity with donated materials you get so much stuff, I really wasn't sure how it would handle or what the end result would look like.) Spray basted at church, basted the batting as a single layer and had to join batting to make it large enough. Hid the join next to the pieced top, did an allover meander and it turned out well. It isn't as heavy as some of the commercial quilts that you can buy, but it is thicker.