Unintuitive, terrible documentation.

Being a trained musician and software engineer, I have a sense about what is needed in a user interface. This program may be powerful, but it is nearly impossible to use intuitively. All controls are hidden or opaque.
Furthermore, the help is not searchable, so you just scroll through 60 pages of junk if you need to find anything.
Finally, the program hits you up for add-ons for additional fees. Altogether, a waste of time and money if you simply want to write music.

Zing43000 about Notion, v2.0.157