Thanks to everybody!
Ok, here it goes. We got to our interview 20 mins earlier, there were already 3 couples waiting too but were were the first one to be caled in.
The IO started checking our paperwork and asked for the originals of all the copies we sent when we mailed the forms. Then she went over every single info we wrote on the forms (names, address, DOB, previous marriages, etc) It took her a good half an hour going through everything. Once that was done she asked us for a copy of 2010 Tax Return, where we filled it together and added it to our file.
There wasn't a lot of personal questions, she asked me about my previous marriage, to be more specific about my divorce. She also asked about how did we meet and how did we got engaged and married. When we were talking about it she asked us if we had any pics, so we took out our photo album but she didn't even open it.
We had with us almost every single document of our life together (joint account, credit cards, even BJ's membership) and she didn't ask for anything. It's good to be ready for anything they ask.
At the end she asked me for my EAD and told us that I was approved. We were in there like an hour.
Quick advise to everybody going to the interview. Just answer what they ask, and never give them any more documents than the ones they ask you. Sometimes more is not good.
Good luck to everybody and God bless.
Ronny