Here is how much I hated the 37 on my Bernina - I would only piece on my little Janome gem because it has the guide. LOL I did buy the 57 for my Bernina 180 when it came out, but was told later not to use it due to the machine sewing a larger mm. The guide for the 57 would run over the feed dogs.
I've since purchased a different machine but would only buy it if it had a good 1/4" with a guide -which it does.