I have used the curve master presser foot. It works Ok, but I found once I learnd how to manage the curves by cutting them on the bias and keeping the convex curve on the bottom ( next to the feed dog) that I really didn't use it that much. I think it also depends on your machine I have a Phaff with a built in dual feed (this is not a walking foot) and it does a great job for me without the special foot.