My sister-in-law got one of these for my kids last Christmas (Genesis version). They play the shit out of my Genesis Collection on PS3 so she figured they'd enjoy this.
I can come back later and add the exact model/brand she got, but it was pretty much a giant piece of shit. I think it advertised something like, 60+ games on it and half of them were not even licensed Genesis games. It stated as such on the box, and the list of actual Genesis games was kind of underwhelming (this isn't something I probably would have purchased myself, for what it's worth) and I think my kids played it for maybe 2 days or so. Also, the controller recognition was really sporadic.