Everytime I use the pounce (which I love, by the way) when I'm done it looks like I sneezed in a cocaine factory. Even my cat won't come near me when working with it.
It does kind of get all over your machine when the needle punches the fabric it kind of poofs up and dirties your embroidery foot. I have to clean up afterward.
That's kind of why I like to do things that need to be marked all at once.
I find it the easiest. I've found pencils are a pain in the butt.