Been playing it quite a lot in my downtime today, the weird save issue seems to only happen on NES roms. I put all my roms onto a different Micro SD card and it now happens very rarely, also doesn't seem to happen on every game. Kid Kool seems to be a problem rom, saving frequently causes issues and reloading a state freezes the emulator.
Got a couple of pics to show the build quality, feels more like the original Bittboy instead of the RS-90 which is a shame, the dpad and buttons feel nice though.
Can see how sharp the screen is with decent viewing angles, NES roms look great.
Gameboy roms have a strange scaling issue which looks a bit jagged, the guy in the Retro Future review stated GB was looked perfect but I don't think he knows all that much.
Light shining through the side of the case from the battery/charge LED.
Another bit of light bleed, no idea where this comes from as there is no other indicator LED on the handheld! Must be a rogue one on the board.
Although the buttons, paint and lettering look cheap the controls actually feel very nice, shame the dpad and buttons aren't textured like the GB/GBP or RS-90.