Finding the perfect marker is about as difficult as finding the perfect mop. I have yet to find the perfect mop, but this pencil works well. The leads are quite sturdy, the pencil advances the lead well, and the leads are easy to change. After marking my last quilt, I ordered a second pencil so that I would have one for both leads, one white and one silver. That saves time in not having to change leads as the values change in the quilt fabrics. The lines remained visible throughout the quilting process and washed out completely when the quilt was laundered after I'd finished it. I'd say it's not perfect but it's darn good, the best marker I've found and tried yet. I Recommend This ProductAbout Me: Sewer or QuilterSkill Level: Expert