I'm working on a quilt right now, that I'm using the Curve Master foot. It works good. I have a hard time when I get to the end of the seam. But it usually ends in the right spot. My pieces are cut on the Accuquilt Studio, so they have a notch at the center points on both pieces. So I can tell if I'm pulling one fabric too hard. I did move my needle position to the right one bump, to get a scant 1/4" seam.