I also became a citizen yesterday morning. The first few minutes before the ceremony was a little bit unorganized in my opinion.
My notice stated that I should be there by 9:15 and I think the ceremony was supposed to start at 9:30. I came in at 9. There was a line for documents review so I recommend to go there early, maybe an hour before the ceremony so you'll avoid getting your seat taken. In the oath invite letter there's a number which corresponds to my seat number. I looked for my seat and it was taken. There was a family of four and one of them was sitting in my assigned seat. I told her that based on my letter that was my seat and well she told me that the clerk handed her a post it note with my seat number on it. I asked her if I can have it to show it to the clerk and she said NOOO! with a rude tone. For someone who's becoming a Canadian that was so dang rude. So I came back to the front told the clerks that my seat was taken. I stand there for probably 3 minutes waiting for them to assign me to a different seat and then the clerk told me to just look for any vacant seat. I looked for one thankfully there were a couple of vacant seats but of course I wasn't sure until the ceremony started whether I could stay there. The ceremony started late around 9:45, thankfully no one was assigned to the seat I took and there 80 getting citizenship based on what the judge said. I talked to the lady sitting next to me and she told me she's also October applicant like me. 6 months processing from delivery to Oath is not that bad in my opinion.
Robert Falcon was there and performed/sang an ethnic song. One officer from Air Force was there too. The ceremony itself was great have no complaints aside from the rude person who took my seat.