My mom made quilts for all the kids and grandkids about 10 or 15 years ago. She always used the cone thread from JoAnns as it is so inexpensive. Now, all of those quilts are falling apart. It's like the thread just disintegrated! Mom is blind now and can no longer quilt, so we are all pretty bummed out. Serger thread is just two ply and not strong enough to hold a seam IMHO. I will ONLY use top quality cotton thread to piece my quilts. I want them to outlive me!