Real fun console, but needs to be connected to newer TV or else the audio doesn't work.
With this console I'm able to play my original SNES cartridges in HD(ready, read 720p) which is real fun.
The color palette is quite accurate and also are the controllers, although the buttons of the controllers seem to have a little longer travel, but they work fine and are nice to use.
I compared this system with my original SNES and it compares great (until now I didn't play NES games so no judgement there).
Compared to emulation on Raspberry Pi (I Use RetroPie), the image quality of RetroPie is much better.
The only downside of the Hyperkin RetroN2 HD is => On my Philips "32PFL5322" there is no audio from the HDMI connection. On my Sony "KDL-32V2500" the audio only works after 15 minutes (the time the TV needs to lock on the audio channel??? Don't know why....) On any recent TV the audio works fine though. This audio issue is a bit of a bummer to me :-(
If you're looking for a HD(ready) NES/SNES console which can play original SNES/NES cartrigdes this is really an great device and in my opinion it's worth the money.