I love the quarter inch guide on my Pfaff Passport and use it all the time. Sometimes I have to adjust the size of blocks but that has not been a problem. Eg., I am doing a double Irish chain quilt. It is 5 blocks across and 5 down so when joining them I have 6 seams and then the alternate block only has 4 seams. I lost 1/4 inch from the first blocks because of the extra seams and the pressing so I’ve had to adjust the alternate blocks accordingly. Not a big deal as I love the accuracy with the 1/4” guide.