I love, love, love my 1/4" foot with the guide! I used the one that came with my Bernina for years, then bought the one with the guide and now it's is soooo much easier to sew that small seam accurately. As was mentioned earlier, I don't have to hunch over to watch the edge of the foot because the guide gives me more visual area on which to focus. Of course, there are times when I need to use the regular foot, as when sewing the seam on each side of the center diagonal line for HSTs.
Anne P in Seattle