After a few months usage here is what I think users who plan on regular pen usage should know:
Not only should your drivers be up to date, but the program you write in makes a huge difference.
In short: forget about xodo. After I realised that basically all problems I had in Xodo never showed up in one note, I switched to Drawboard PDF (edit: single payment 10€) and now the writing experience is smooth and wonderful.
Only not while charging. A plugged in charger will Fuck up palm rejection far beyond bearable, no matter the program. Even worse in Xodo.
Edit: as long as your palm stays off the screen, writing in Drawboard still works fine while charging. Xodo: see above.
Up to preference maybe: a softer pen tip is better. I switched to the SP4 (borrowed from farther in law) and much prefer the feeling.
Guess I have to cough up the bucks for my own (SP5, because: black) pen soon.