I do not have one personally, but it seems very similar to their other tv games. I love the Atari ones and have all 4 of them. The graphics and sound may not be perfect replications, but it's cool for what it is and that's a cheap little tv game device that can play original genesis games. (They'll be $30 on Black Friday/Saturday @ ToysRUs. They might be cheaper elsewhere)
...I'd also look into getting an original Genesis controller since the wireless one undoubtedly sucks.