I have used my serger to piece and it works very well, especially on flannel. It keeps the fabric from fraying so much. On all my quilts, I serge around the whole quilt before attaching the binding. Works well and the layers are all lined up well. I love my serger and use it when ever possible as it is much faster. I plan on making a quilt out of double knit fabric (I have tons of it) and using the serger. I will see how it works out.