I tried this on XBLA. I never played it in the arcade, but it looks like straightforward emulation, with the Japanese ROM unlockable after completing the game, according to a review I read. (It says "Japanese ROM" in the menu, greyed out.) Display choices are smooth (filtered) and sharp (jaggy), as well as stretched to fit or the correct 4:3 aspect ratio. You get the first level up through the boss (in the demo). If you liked this before, it should be perfect for you. I couldn't see spending $10 on it.