Unfortunately, they don't work for me. First, they are not reusable as I thought, so it's a lot of work for just one use. The simplest dot pattern did work for me, but dots are easy enough even for me without a stencil. I tried roses and bows, and they turned out so bad I gave up. For me I have a lot of options, with stamping or decals, that I just don't find these worth making any more effort with.
Did anybody else try these? Did they work for you?