Fantastic tool!
I got this as a birthday gift last year and love it, love it, love it! It works best with a glass cutting board, but I managed without for a while (just don't use a self-healing mat.) I'm still learning to use it, which shows in the LOs I've done with it so far, but I'm thrilled with it. No more painstaking work tracing circles from coffee cans, just easy circles whenever I want them.