I don't have that machine, but I have a stitch in the ditch foot for my Pfaff, and I love it. I have no trouble stitching in the ditch, and it is because of that foot. I quilt a lot, and it is a life saver. I just put that center thing in the ditch and stitch away. I press my seams to one side, and that is not a problem, though I do slow down when I reach an "intersections."
I have a lot of trouble seeing a straight line because I have wet macular degeneration and have lost the center vision in one eye. (That is rather a simple explanation of a complex problem, but I do not see straight lines.) This makes SID in the ditch really tricky for me, but not with this foot.
If this foot is half as good as mine, I would go for it.
Dina