I have both. Used 37 for the longest time as I didn't believe 57 was worth the investment....UNTIL I TRIED IT, that is. That is now my "go to" foot, but do use the 37 for some application. I recommended this foot to a fellow Bernina user. She bought it and loved it. Even bought a second basic Bernina to take to classes and made sure she had the 57 with it, as the shank was different.