Employment Based Greencard

Hi folks,
It time to payback to this wonderful website. I got my green card which was approved on spot. Before starting to share my story of interview, let me suggest you to trust North America Immigration Law Group as professional attorney for your green card application. Beside I-140, I have filed my I-485 using their services because I found them very organized and responsible. They suggested me to file my I-1485 but I emphasized that I need your company to do everything for me. I am quite sure that it was right decision because their well experience on filing packages before sending to USCIS made me to have my green card within 8 months. I never received REF or any required additional documents.
Here is my timeline:
I-140 submitted to USCIS middle of Sept.2017 (normal process)
Received approval of I-140within 2 months on Nov. 2018
Submitted I-485, and I-131, and I-756 first week of Jan 2018
Transferred to NBC Last week of March 2018
Received approval of combo card April 10, 2018
Combo card in the mail box on 14th April
Received scheduled interview letter on middle of May 2018
Interview was done on First week of the June 2018
GC approved in spot and received GC in mailbox 5 days later
On the interview date, I arrived 3 hours earlier. I submitted my interview invitation letter to information desk and after 30 minutes somebody came to me with my documents in his hand. We went to his office at level 3. Interview was about 4-5 minutes. There were 2 interviewers. Oath, attorney waiver letter and date of birth were first questions. Then he went through all I-485 questions (only keywords) and I was like a robot saying NO every 2 seconds. Just for question number 25 I said Yes because I had speeding Ticket. He asked me did you arrest. I replied No, and then he said my questions was have you been arrested or no, speeding ticket is traffic violence.
He also asked me why you changed your address. He was very serious because he asked me did you do anything wrong? You could continue your lease. Changing address must have a good reason. Then I replied I wanted to be more close to Uni. He asked me why you didn’t attend in army. In your country it’s compulsory. I told him I never attended because I paid to army instead. Then I submitted the evidences. He also asked me to describe my research topics and he surprisingly asked very scientific questions from my research which was far from not high educated person.
Then he said we are done. You will get your green card within two weeks. I asked him do you need my recent papers or tax for 2017 or my recent google scholar or patents? I have copy of my other offer letters if you need. Then he replied No, you are NIW. We don’t need any of them. Just continue in your research filed. Thank you for coming earlier than your appointment. And Thank you for coming alone. Bringing attorney to interview makes me nerves since I need to check every single paper of your documents.
The other interviewer is also finally talked at the end of interview while going back. “You did it prefect”.
Hope you guys having your GC soon :)