After owning it for a month now I can finally say that it is a really great system. It's not a perfect choice for everyone but if you are looking for a good way to play old NES, SNES or Genesis games this is a great option.
What The RetroN 3 Gets Right
The RetroN 3 perfectly recreates the gameplay and feel of the original NES, SNES and Genesis. So far I've been able to play every game i've thrown at it and the games themselves feel great on it. You can plug in one Nintendo, Super Nintendo and Genesis game into the top of the RetroN 3 at one time making it nice to switch around from Mortal Kombat on Genesis back to Dr Mario on the Nintendo.
The RetroN 3 came packed well in the box and I didn't find it hard to unbox and setup. Sometimes packaging and setup can be frustrating, but it was really easy to understand. I had to lookup how to pair the wireless controllers to the system but after that was done everything else was a breeze.
Customer Support through Hyperkin is also amazing. My system shipped not able to recognize my original Super Nintendo controllers so I contacted Hyperkin and they quickly allowed me to return my RetroN 3 and took care of shipping. The whole process was seamless and I got my replacement system back in a week or so. It's often hit or miss when dealing with returning things back to the manufacturer so it's nice Hyperkin was so great to work with.
Things I don't Love About The RetroN 3
The included RetroN 3 controllers seems built for the Sega Genesis. As someone that only has two Genesis games and a ton of Super Nintendo games this was disappointing. The Genesis style controllers work well for Nintendo games but completely fall down on the Super Nintendo. The lack of shoulder buttons make playing SNES games on the included controllers a chore. So much so that I'd recommend using your original Super Nintendo controllers with the system. That all said the included wireless controllers are fine and work well on Nintendo and Genesis games I just seriously wouldn't recommend them for Super Nintendo play, which is too bad.
Things You Should Keep In Mind About The RetroN 3
The RetroN 3 only supports RCA analog video & S-video. If you are looking for a system that will output to HDMI I suggest you check out the RetroN 5. The RetroN 3 is a good system for older CRT TV's but nothing i'd recommend using with your zillion inch HD TV set.