Let me first say that i have a thing for pressor feet.  I love this foot because it takes the guesswork out of doing 1/4 inch seams, and as an added bonus if you line up the fabric on the other side, you get a 1/8" seam.  With an all purpose foot this is hard to do because the fabric wants to lift up over the inside of the foot.  The wider part od this foot keeps the fabric in place.  I would highly recommend this foot to anyone who deals with narrow seams.  Besides my overlocking foot (which came with my brother cs6000i), i would have to say this is my favorite.