I own a serger and I love what little I have done with it. I am challenged with the threading, but have taken it to quilting classes and am learning the advantages. I used it to sew on the binding of placemats, and it looks so professional. I whipped up a great pillowcase with ease. Of course that it is class with a teacher. I need to learn to thread it without help. I think I will try the tying off the thread so I don't have to keep threading it.
I have talked to a few women that say they only use their serger to sew quilt tops, and use the sewing machine for things the serger can't do.
I like the idea of serging the edges when you wash fabric.