yeah I have no idea if mine is good documentation lol I got married in 2016 of September and didn't submit the application until September 2018. Civil Wedding in Argentina with no family members there. We had two witnesses that we met through airbnb and translator for me. Letter of Support from my parents acknowledging our marriage. Everything else I submitted was pretty straight forward and standard, pictures, communication, receipts and all that according to the lawyer. I also went to see her in Peru 2 times before submitting the application.
i think a lot of you didn't need interview either.
no such thing as good documentation, its all up to the person personal discretion.. you might have everything straght and forward but if the person wants to request interview or additional documents he/she has every right to.. also 6month mark are the only lucky ones, like winning the lottery