/vr/ - Retro Games

I actually got a bit curious about this system. But what I want to know is, what are the bad sides of this system?
From what I've read and watched reviews, the only thing I've seen is that there is a slight input delay, but from what I understand, it's nothing THAT bad. That and the controller that comes with it is a piece of shit.
How is the audio quality? I remember that in previous third party consoles, the audio has been pretty shitty compared to the original.
As dumb as it sounds, one of the main reasons I'm interested in this is to play GB/GBC/GBA on the TV, but what controller support does it have? Are you forced to use the shitty one, or can you use a S/NES one for example.