I started using Pounce several years ago and love it for certain applications -- especially the white on dark fabrics (I have all colors). I think it is best used with the correct type of stencil, I usually go to:
https://fulllinestencil.com/about-us
The stencils are really nice to work with and durable, better than the plastic ones that always seem to get warped. I've done what I consider very intricate designs like:
https://fulllinestencil.com/60008-wi...t-5-width.html
Think that was it, pretty sure it was in a 6" border and not the smaller size. I did the quilting on my friend's longarm, it was a series of three wall hangings with an appliqued 3-witch center for herself and two childhood friends (witches were dressed and had hair and eye colors to match their real life equivalents). Each was roughly 40x60" or smaller. The stencils held up well with repeated use/storage cycles, and the white showed up well against the predominantly dark borders.
edit: It's been a few years... they started as wall hangings and grew to throw size with borders. Think they were generally more like 50x72, anyway -- quite a few repeats!
I've made my own and used more traditional stencils with the Pounce pad as well. Once you've got it down, it's great. But yes, sometimes we find them unwanted...
I have not tried the marking pencil but I plan to add one to my cart next time I get stencil(s).
The Urban Elementz site is also highly recommended by me and I would have a high degree of confidence in anything they recommend. Since I really have no sense of design for the quilting, I've been going to that site for pantographs for years!