I use it sometimes but prefer stencils with dissapearing ink pen.
Pounce is messy, cant get it to work without dust. I did find that if I use a wet cloth on the quilt before I pounce that the chalk sticks better. I have both the white and the blue chalk but they only work on some colors but the pen shows up on many more fabrics.
I also have some chalk pens but they dont work that well either. Havnt figured out how to get them to draw. The one with the wheel works well but only for straight lines.