Hi
I have two suggestions that I believe will make the user experience a little bit better when working on more notes at the same time:
First in the future I would like to see a the possibility of pinning a note you are working on inside of the notebook, so it always will be on top.
Next I hope to see the possibility of tab like changing between notes, as you sometimes need to switch between two notes placed in two different notebooks.
Best regards Mathias