Yes, I did. It's an improvement compared to the Dingoo A-380.
I like the faster CPU and more RAM. I also like it that you don't need to open the console anymore to remove the internal MiceoSD card. The d-pad and buttons work well and the L and R shoulder buttons are much better compared to thje Dingoo A-380.
I've got RetroFW installed on a Samsung EVO Plus 256GB SDXC MicroSD card. I can get it to run stable overclocked to 648MHz and as low as 200MHz to suspend the console.
Most of the games and emus run much smoother because of the faster CPU and more RAM. Not everything seems to run just fine. Intellivision emu is broken, Chocolate DOOM seems a step backwards compared to PrBoom (doesn't run total conversions so it's very limited), Wolf3D runs only the shareware version. ScummVM is outdated. ReGBA support is broken. No MidPath emu (it strange that nobody seems to care for this as this does run some nice games).
But I wanted to buy it to run MAME, FBA and Atari Lynx and it does that much better than the Dingoo A-380.