Today we have our interview scheduled at 8:45 AM , reached there around 8:15 AM . We went with our Son ( 2 yrs old) no problem even they allowed his water bottle, went to first floor check-in/Reception ( it was different in last Nov for my citizensive interview I went straight to 2nd floor check-in counter) , gave us a ticket and told us to wait in 3rd floor.
Around 8:30 AM , one very serious looking officer came and took three of us to his room. After swearing , he just went through all info in I-130 and I - 485 . Took the I-94 card and AP paper and cancel my wife's current F1 visa in her passport . Then he asked about our son ( bdate , bcertificate ) also asked if we want to add any documents in our file , so we gave him some utility bills , 2010 tax return , he said he didn't need any more .. We had some typo in I-485 and we corrected when he was going through all the questions.
Most of the time he was constantly working on the comp and updating stuffs there .. no more questions on anything .. then he printed a letter which says that your I-551 is approved and we should get the card in 30 -60 days .. and if we need to travel before getting the card , we should get info pass and take a temporay stamp for the approval. He then congratulates us ..
That's it .. it took 10 -15 mins ..
While commning back to home we got the CPO SMS and email.
One more thing .. we were very confused whether to take our son to the interview or not , so my wife went to USCIS ATL office with an infopass last week and they told us we should bring our child .. there shouldn't be any problem.