Thanks for letting me know about this, Schin.
How does it work? It works like any regular fountain pen, it just has interchangeable sections to accommodate a handful of nibs I built around the unit. Please have a look at my Facebook page, more information is there. The website is on its way. I have more elastic nibs than the Zebra G, but those will be available later after more testing. G nibs suit the vast majority of occasional flex writers. If you're a calligrapher, however, I'll have other ones available soon, including stainless options, and the Leonardt Principal EF.
I don't check this forum very often, so if you have direct questions for me, please email me at DesiderataPens(AT)gmail(DOT)com.
Pierre