So far, I'm liking it. I rinsed it out before using, and there was trace amounts of blue ink already in the pen. Mysterious.
I filled it with Noodler's Heart of Darkness, and it writes very smoothly. Left it sitting overnight, and it continued writing smoothly this morning with no hiccups whatsoever. Very nice! It's supposed to be a "fine," but it really seems like more of a "medium" to me. It comes with a piston filling cartridge converter which didn't seem removable at first, but it just slides out if you pull on it a little.
I got it from AliExpress, if you're wondering. It will surely be available on eBay soon enough.
They're pretty rad if they fit your use case. For me, they definitely do.
FWIW, I (not OP) have a Majohn A2 Press, and both that and this are mechanical clones of the Pilot Vanishing Point. I also have a (much older) genuine Vanishing Point, an Oaso K016 (which is kind of pants, honestly), and a Platinum Curidas. I have written here at great length about all but one of those already.
Obviously I have a... thing... for retractable fountain pens.