I have two 1/4" seam guide feet. One is true, the other has the metal that you put your fabric up against and it's off quite a bit. So, I use a seam guide. I actually bought "Seam Guides' and use them. It helps me make sure I'm doing 1/4'' seams. I should return the foot that isn't correct. It came with the machine but I bet they'd replace it.