I’ve gone all in with XTEink. Gorgeous little readers. Lots of people are flashing different firmware but for those of us who just want to read, its only fonts that need to be installed, because the built in one is rubbish. There are many available though. DPI could be better but I am happy with my small devices.
Reviews on youtube:
https://www.youtube.com/results?search_query=Xteink
XTeink website:
https://www.xteink.com