Many unique features, yet buggy graphics.
Features. ZoomNotes is the king here: if Good Notes or another note-taking app doesn’t allow you to do something you need badly, try ZoomNotes. Subpages, layers, text heading levels with automatic index creation, handwriting indexing, split screen, et cetera, et cetera... In terms of features the evolution of ZoomNotes is much faster than that of Good Notes. Moreover (kudos to the developer), ZoomNotes is just as stable as Good Notes, which is amazing given the number of features. Graphics. At the same time, ZoomNotes has all kinds of super-weird graphics bugs: selected handwriting visually disappearing if you happen to touch some other text, handwriting “jumping” while being rendered onto the page, text visually remaining on the page after being erased, text blinking one last time after being erased, etc. So this is the choice to make. If you want smth neat and only need the most basic features, ZoomNotes may not be the best choice. If you actually take notes and have at least some non-trivial requirements for the note-taking app, chances are no other app will provide the functionality you need.