I had my interview on March 30. I was in the building for maybe an hour in total. It was super easy and went really well but since my I-751 case was still pending, there was no final decision on N400. The officer had to request a transfer of that file from LIN service center and approve that first. Today (April 13) got notification that the I-751 case has been transferred. I am hoping both will be approved soon and the oath ceremony will be scheduled right after.