I had my interview today and it went really well from what I believe! No indication on whether or not we were approved -- she just said if she needs anything else from us we will get a letter in the mail.
She asked for IDs (passports, drivers license), my EAD, birth certificates, marriage license. She took all of my documentation for proof of relationship (financial documents, photos, beneficiary documents, cat adoption forms, lease + lease amendment, phone bill, insurance documents).
While she was organizing our paperwork, she told us to prepare for a few questions: when we met, how we met, how we got engaged, how we got married. She didn't actually end up asking us the about our engagement and marriage, just about how and when we met online, met in person and how we maintained our relationship prior to meeting in person. She asked me how many times I've been to the US, if I've ever applied for a US Visa (since I'm from Canada we discussed how I didn't need a Visa to enter the US), if I had parents and what they thought about me moving to a new country and getting married to an American citizen. She also asked where we worked, where we were both born, typical Yes/No questions from the i485 form.
It went by pretty quickly and hoping to see an approval soon!!!