Pretty meh. The clone systems themselves aren't bad, not great but not bad. Pretty much the same level as an FC Twin. But it's the way they are combined that sucks. It only uses special controllers with Genesis connectors but NES/SNES signalling. Also, there are some accounts that the way the video is mixed causes it to look like crap. You are better off with a Retro Duo and a Genesis or clone. Of course, real hardware is always the best.