I have a pfaff and the 1/4" foot with the guide is just the best foot ever! Its a perfect scant 1/4" seam even with curved seams as for the double wedding ring quilt.
I've ordered a 1/4" foot with a guide which will hopefully fit my Juki. The Jukis compensating fot is just not a scant 1/4" and the magnetic seam guide is far from perfect. I'm so hoping the new foot will work because otherwise I will only be able to piece simple blocks on it or I will have to recalculate everything.