I got myself some of these pens.......I too loved them but just a small warning.....please test these on your material before putting them on your quilt. I used it on some material, lighter colored and when ironing it all came out.......but I than tried the black on some purple canvas material for placement of a embroidery and I realized I wanted to move it so I ironed it to remove it and I had a white line.......I paniced as this was not my material....I was just doing a embroidery for someone. I let it cool and tried to iron again to see if it would go away and it didn't go away, I did happen to remember I had some fabric markers and a purple one so I did my embroidery and than took the purple fabric marker and covered up the line. Than I was making a bag and used the red and the same thing happend so please please please test first on a scrap peice of material.............I still love these but just will be careful on what I use them.