The process was efficient and adequate. My only concern is that after the approval they indicated I have to wait 3 weeks (!!!) to get my passport back and it appears to me a very long time for such a sensitive legal document. I walked out with very mixed feelings due to this and I am still hoping the documents will be returned faster...
To summarize:
My appointments was scheduled at 7:30am, I was at the door for 7:10am there was already about 8-10 people in front of me!
At 7:30 they open the doors and only let appointments from 7:30 in (some people were at 8am and showed up early).
Security: don't bring backpacks, big purses: I only had my wallet, documents and car keys: they kept car and gave me a little number (I think they were doing the same with mobile phones). If you have a big purse/backpack they will turn you away and tell you to come back.
They give you a sheet with your number and your proceed to assemble the documents in the indicated order. Pretty much all the documents previously listed and what is indicated on the packet4 letter. Don't forget 2 photos + proof payment.
They call you to a first window were you give all the documents and they take your fingerprints.
Next, they call you to another window for the actual interview. Questions were straighforward:
1) how did you meet
2) when is the first time you met in person
3) did you meet his family
4) were you or him married before
5) do you or him have kids
6) when do you plan the weeding
They also made me do the official "I swear that I am telling the truth".
That was it... she gave me the pink paper and said that current timeline to get documents back is 3 weeks!