For anyone interested in these Android handhelds, I just finished my review of the YDPG16. It's a new handheld for emulating systems up to and including the N64 and PS1. You can check out the review by clicking the image, if you're interested.
If I didn't have the JXD S7100 I'd definately be looking at this one. I much prefer the look of it over the other Yinlips models, or the s601. Now it'd be interesting to see if these devices support more external controllers like the USB IR Wireless one on Willgoo. That controller isn't the best, but if it had a layout that was N64 friendly it'd be great