I bought the 1/4" foot with guide for my Pfaff when they first came out. I think it helped when I first started quilting and I really needed all the help I could get. Now I just use a 1/4" foot without the guide and like it a lot better. I also have a stitch in the ditch foot with a guide, and I absolutely love it for stitching in the ditch. It really does a great job of keeping you in the ditch.