As nice and clean as a French seam looks, I wish I had a serger. If I had a serger, I could easily finish raw edges, which would be especially helpful when I make drawstring bags.
I wanted a drawstring bag the size of a large trash bag so that I could nicely cover our suitcases (which sit in the garage). The difficult part of using French seams in this case comes when you leave an opening for the actual string. I found two different options online: