I want one myself, mostly because I just like stuff. From the pics on the package, it looks like the Genny version, as they claim. I would think that it'd be accurate. Wasn't the Genesis built using pretty garden-variety parts, nothing too custom? Genesis tech should be fairly cheap to reproduce these days.
I think that it's a cool idea, really, though the Genesis version never quite felt right to me. Maybe I was too used to the SNES versions.