I have that pounce pad. I have only tried it a couple of times. The problem I had is that I could not see the chalk on my quilt. Maybe I wasn't getting enough on the quilt or something, but it was very frustrating that I could not find the marks when I was sewing. I didn't have any trouble getting the marks off, especially since I couldn't see half of them, I just used a clean slightly damp towel and wiped it off.
Not sure I was any help, would love to see what others think of the stuff. So far I am not impressed!