I have two 1/4" feet almost identical. One has the little guide and the other doesn't. I wish I had never bought the one with the guide. I think I subconsciously put my fabric up against the guide and it results in a "chubby" 1/4 seam rather than the scant that is just perfect. I wouldn't have known about this tendency had I not had both feet so live and learn I guess. My guideless foot works just perfect but I would caution anyone about repositioning the needle on some 1/4 feet. Mine doesn't allow repositioning needle so don't find this out the hard way with a broken needle. Don't ask how I know!