I have the presser foot one on my babylock, and oh learn how to use it, It took a bit for me to get used to it but it is so much faster when I am piecing it isn't even funny. I had to start using the foot control with my left though as I tend to go at the same time and the right leg was doing double duty. It frees your hand to line up stuff and all of that, rather than have to reach back, ( I know some now have a putton to up and down the presser foot, the new quilting brother does, I find it really slow though, would drive me nuts)