Any experience with the BrailleRap open source Braille embosser?

Does anyone have experience with this Braille embosser? I haven't found any reviews or testimonials for this, but that may be because it appears a lot of the development has been done in France instead of the U.S. I'm totally blind and am interested in it for producing Braille graphics, specifically as a way to get an idea of what a design I create using OpenSCAD will look like before 3d printing it. I can't justify $2000+ for commercial embossers that can print graphics for what is a hobby I'm not sure if I will stick with.