The best use of my serger was in serging the lining to the velvet of the princess design with sweetheart necklines of 10 bridesmaids dresses for the wedding of son #2's best friend. If you've ever worked with velvet, you'll have some idea how much fraying and fuzz the serging prevented. Nowadays, I use it for the quick making of dog beds for the shelter and finishing the edges of fabric for prewashing (I confess that I'm old-school about that). I wouldn't be without my serger when it comes to construction of garments with knit fabrics either.