I created an additional right-angle registration with a permanent marker, then mentioned this to the company, which said these lines will be added to all of their new shapes. The stamps are accurate and the pads elevated, so it's easy to apply ink to the stamp's entire surface. The ink is permanent with heat-setting and doesn't bleed through the fabric. Since the stamps are wooden-topped, as shown below, they obscure the fabric when stamping, which means you can't butt one cutting line right next to its neighbor as easily as when tracing around clear templates. But stamping is so simple, fast, and accurate that this seemed a minor trade-off.
Directions are clear, with frequent tips.
Seventeen other single stamps are offered in basic shapes and sizes from 1 to 4 in. The corners are removed, making it easier to match patches together, which makes sense and works well, as long as you're sure to cut your corners off to match the templates. The directions are detailed and come with block-pattern suggestions. Millett quilts and tests in Trophy Club, Texas. Used by permission.