I'm seeing pockets of discussion about this, but it seems to me that the Notes tool lags to an almost unusable extent. So much so, that I have almost shifted entirely to the web app when I'm taking notes.
The only thing I can think of is that maybe I'm using the Notes tool in a way that it's not designed to be used. Basically, I use a note like a running document for sermon prep. I don't write my sermons in the tool, but I use it in the same way I used to use a Evernote.