I love my rolled hem foot, but it took alot of practice to use it well. Some fabrics don't like it at all and are just not worth it to use. It helps to roll the first 4 or so inches by hand and then feed it into the foot a bout 5 inches from the start and work it back down to the beginning of the hem to actually start sewing. Then keep it taught and folded over as you feed the fabric into the foot. It takes practice. IMO a better tool I'm using more is a magnetic seam guide, $5 at Joann's and works great.