The functionality is great, but it is not user-friendly to start using. It took me too long to figure out to give this 4 or 5 stars.
I'd suggest making a sample form and document (which can be copied) in the context of a tutorial (quick start). Better yet, if there was a way to spit out all the fields from a form into an empty Doc (to get started with making the template), it would save a lot of copy-paste and errors. Perhaps some function in the Add-on menu to give you a list of current fields that you can copy into a doc? Template creation is tedious otherwise.
I'd also like to see a built-in <<row-number>> or something that's unique to identify the form submission. Our work flow requires numbering the documents we create with a unique 3-digit number (001, 002, etc.) so they can be sorted by name properly. Ideally, this would also take into consideration re-submissions of forms (to keep the number already assigned).
You can consider "marketing" this tool as an alternative to Mail Merge with Word. Actually, we were using Google Forms to populate a Google Sheet, downloading those results to Excel, and Mail-Merging them with word to generate pretty versions of the completed form. This plug-in permits skipping a lot of that! Keep it up!
I'm also using new Google Forms (purple) and whenever I update settings, it opens a blank browser tab. This seems like a bug (although it seems harmless)?