the Retro Duo system plays: Nes, Snes, and Super Famicom games. I bought one so I could play the org. Star Ocean, I enjoy it. the picture/sound quality is good. other systems include..  FC Twin-(just like Retro duo) Gen X dual station-plays Nes & Genesis games.  FC 3 Plus-Plays Nes, Snes, and Genesis games. I recommend them to anyone who enjoys classic games

Postives-variety of colors to choose from, great deal due to org. hardware being expensive, many systems  in 1.  Negative-some titles may not work(check to see if a game doesn't work on the system before purchasing)