@sangsue no, you certainly you didn't waste it. You'll find the app generally helpful for planning, outlining and editing complex documents of any kind really that you want to import or export from the various formats we support.
We haven't got templates in the app yet prepared for non-research article typed content but this is coming up (very much also based on requests that we receive!). Thank you for supporting our work and please let us know either here or via firstname.lastname@example.org the kind of things you'd like to see us add or change in the app.
CEO & Co-founder of Manuscripts.app Ltd