I've been using a sewline marking pencil for years- I like it= I get a nice fine line, have never had a problem removing the markings- just don't heat set them- I always launder my quilts as soon as I have the binding is done and I've never had problems removing marks- I like my sewline pencil mainly because I can change leads to the color I need to show up on the quilt I am marking- nice fine line that does not skip. there will probably be some who have not had good luck -or do not like them but for me mine has been my go-to marking pencil for at least the past 7 years.