We had our interview today (Chicago, IL). Pretty anticlimactic experience after all this waiting. IO wanted to see old passports with all the visas, current I-797s (took copies), my recent paystubs, tax transcripts (took all of them, even though they were part of the AOS package except the most recent one). We assured him that we really don't want to practice polygamy, nor overthrow the US government. After that he said everything looks good and that he'll review the case in the afternoon. We said goodbyes and left. We received CPOs before we got home. Update: Due to all the emotions I forgot the most important thing: @Sm1smom thank you for all the help! Without you it would be even more stressful.