Hmm, well I was using my 1/4" foot with the guide recently and remembered why I don't like it. I can't seem to pull my pins out quickly enough for it and they pull the seam out of alignment. It also doesn't let me sew over seams very well.
My all time favorite 1/4" foot is the Little Foot. It's clear plastic with bright red markings all around. Best $22 I ever spent for these aging eyes.