I started out years ago when I still got thrilled to get even two blocks in a row to match within one quilt, with muslin. It was inexpensive and the more you washed the quilt, the more comfortable it became. I know the latest and the greatest over the years has been to use various methods of fabric as the backing, and I usually try to play nice to make my quilts look nice also. But once in a while something will jump into my tiny little brain and out comes the muslin.. Plus once I have it laid out exactly where it needs to be and can be hooped and embrorded on. Actually it looks kind of cute or pretty depending on what the quilt itself is all about. My thoughts..