I've used one since I first learned to hand quilt. I don't use it exactly the same as Jean Brown does but It doesn't matter. I just like how the needle skims off the Aunt Becky instead of my finger!
I've tried other methods but my stitches are smaller and nicer looking when I use Aunt Becky.
I quilt "towards" myself, with a rimmed thimble on my top hand, if that makes any difference.