I've seen other min-arcade style VFD consoles, but, this is the first one with 2 separate VFD displays opto-mechanically superimposed via a semi-transparent mirror. I wonder if the Zaxxon game was any more expensive than the Ms. Pacman, or Dkong Jr. I also wonder how the battery life compared to a single VFD unit since the VFD heaters eat a good chunk of the battery life.