I don't think anyone's first quilt is destined to be their worst, any more than their first pot roast will be their worst. I DO think your SIL needs to find someone besides those quilt shop instructors to learn from or she's apt to wind up never finding the joy in quilting. Sounds like they've gone way beyond being 'quilt police' right into being 'quilt gestapo'...ripping one seam 30 times, really??! That's SO wrong.