The Yobo FC is what I have, and it works perfectly fine. My only problem is that it has only one audio cable, meaning the sound is REALLY low (I have to crank it up to a volume of 70 to hear it as well as I'd like). The sound is also just a tad bit different, at least in pitch but it's hard to even notice unless you've actually played the original NES. It works well with the accessories, but I have yet to test a game genie or unlicensed Tengen cartridges on it. I've had it for a few years, and it hasn't shown any signs of dying on me. The controllers can act strange for a few moments if they aren't cleaned properly so be aware of that.

It's very inexpensive for a clone console. I've heard people getting them for 20 bucks on the internet.