So, when it works (like the thighs of the bottom-left and middle legs), it *really* works. In a couple of seconds you get a beautiful, neat, geometric pattern. When it doesn't (everywhere else), it looks miserable and you might as well repaint the whole area.
In this first batch I had to repaint most of the lower legs and sometimes all of the legs. Overall, about 2 out of 6 legs were good on the first go, which is not bad for a first "real" attempt.
At this point, I'm thinking I just need to practice and try again until it looks good. Stamping is a particular knack. It has to be done quickly and smoothly, with no corrections mid-stroke (although you can correct a little afterwards with a thin brush and paint or varnish, depending on the area). I figure once I get it down, it will make things considerably easier, quicker and neater. At least that's the hope.