I use the #20 almost exclusively for anything but actual quilting. With the needle one click to the right it gives a perfect scant ¼" seam, the fabric is grabbed by both feed dogs (unlike the 37 and 57) so it feeds accurately right to the end, and the open toe makes it very easy to see exactly where I am going. For quilting, I use the walking foot and the #24 open toe metal quilting foot (I hate plastic feet).