I have a Boox Palma, it's really portable, but the tradeoff is the screen is pretty small.
Having it run android is both a gift and a curse. Being able to use self hosted solutions with it is nice, but the Boox OS kinda sucks (and it feels like I'm fighting it at times). On top of that not everything runs smoothly on it as it's hardware isn't the best.
I've also noticed it can run into "burn-in" issues where the text doesn't fully clear until you force it.