I can confirm that this works on my Innovation Super 8 adapter for my SNES. It's a nice addon to have for your SNES if you don't want to have your Famicom or NES hooked up to your TV. As far as the quality of the clone system, I haven't found one original game that doesn't work.
I can confirm so far that these NES\Famicom games work with the Super 8 without issue:
- Super Mario Bros. \ Duck Hunt
- Super Mario Bros. 2
- Super Mario Bros. 3
- Tengen Pac-Man (gray case)
- Mario Bros. Arcade Classics Series (5-screw)
- Donkey Kong Classics
- Nintendo Tetris
- Othello
- Caesar's Palace
- The Legend of Zelda
- Zelda II
- Home Alone
- Dr. Mario
- The Bugs Bunny Birthday Blowout
- The Bugs Bunny Crazy Castle
- Duck Tales
- Castlevania
- Castlevania II: Simon's Quest
- Castlevania III: Dracula's Curse
- Road Runner
- Teenage Mutant Ninja Turtles
- Teenage Mutant Ninja Turtles II The Arcade Game
- Teenage Mutant Ninja Turtles III The Manhattan Project
- Gryomite
- Metroid
- Galaga
- Rad Racer
- Rad Racer II
- Akumajou Densetsu
- Space Invaders
- Life Force
- Kirby's Adventure
- Pinball
- Back to the Future
- Back to the Future Part II & III
- Super Off Road
- Rockman 6 in 1 Famicom pirate
- Contra
- Super C
- Contra Force
- Mega Man 1 - 6
- Jeopardy 25th Anniversary Edition
- Game Genie
Every game that works with the Everdrive N8 should work fine with the Super 8 as well. I know that MMC5 isn't supported at the moment on the Everdrive N8, but you can actually play Castlevania III, if you have the original cart, on the Super 8. This is not meant to be a comprehensive list, but it should help as a reference.