Just watched your review, Satoshi. Nice stuff. It's kind of unfortunate that the 3.5mm jack has to stick out the side like that. Wonder why they couldn't have it come out the back. Obviously irrelevant in the grand scheme of things, it just would have looked nicer that way.
Aesthetics aside, and controller preference deal aside, this really does seem like a sweet piece of gear. I think I'm going to wait for some Retron5 reviews though.