Piecing with a serger is doable but the designs and patterns you can make are very limited. As previous posters said it typically cuts the fabric and would add bulk to seams, so the ones I've mainly seen are those with exposed seams that are finished. I've seen some cute, juvenile quilts made on some t.v. shows using a serger but it's not something I'm interested in doing with my serger. It's used for clothing in my house.