I have used it once. It really helped me follow the pattern. I will say it is kind of messy with getting all those little plastic pieces off the quilt, but I would do it again. Right now I'm using waxed paper. I read somewhere about using it. I didn't mark it with any ink. I used an old tooth brush that I had my husband sharpen the end for me. I put the the wax paper under the stencil and mark. So far I've been able to do okay with it. I'm going to see if I can post a picture from my phone to show you what I mean. If not, I'll try to get a picture with my regular camera.