Aliens who are physically present in the United States already are allowed to immigrate without leaving the United States to apply for an immigrant visa. This process is called Adjustment of Status (AOS). The USCIS will permit an application for AOS to be filed only if an immigrant visa is immediately available to the alien. Section 245(a) of the Immigration and Nationality Act (INA) governs the general AOS provisions.
I had my interview back in November, at the Buffalo (NY) DO. It was so quick we were in and out of the office within 10- 15 mins. We had a very nice woman officer.
She asked us to swear the oath, she asked us 3 questions and wanted to see our utility bills.
Once she had photocopied them, she came back in the room and said my GC had been approved. She said i should recieve it within 2 weeks, which i did.
Hope everyone's GC interview could be so quick and easy.