I use Krita on a Samsung Galaxy S8 Tab Ultra. It’s absolutely brilliant and I was able to get it at a much cheaper price than the S9 ultra. The screen size is ideal for drawing, Krita is very responsive, and the touch gestures are really highly configurable.
I’ve been able to map the quick palette, undo, redo, rotate canvas, zoom canvas, and enter/leave fullscreen mode to touch gestures and they work perfectly.
Edit: I was also able to map the S Pen button and get S Air actions following this post’s advice:
Palm rejection is also very good.
The app very occasionally crashes, but with Krita’s autosave feature set to autosave regularly, I’ve never lost a significant amount of work.
Overall it’s been ideal for me.