I only got one recently (recently as 2 days ago from the posting of this message) and the only gripes I've had are the lack of a PSU in the box (thankfully, I had a suitable unit that provides enough amps to power the console without issues), using USB micro B for power (although I'm not a fan of type C either considering I've had more broken type C cables then I have micro B), the lack of modern Wi-Fi standards (2.4 Ghz might be enough for the odd firmware update, but who just uses old standards in this day and age) and the fact that you have to completely remove power from the console when you turn it off to be able to turn it on the next time you want to use it.
As for gameplay, I haven't had any issues in my brief run of tomb raider, although I did pick up a second cartridge so I'll be able to see how it handles amiga games when next I have it set up.