I had my interview a few days ago at Chatsworth, the San Fernando Valley office. I was approved and had an oath ceremony the same day. The officer said their first oath ceremony of the day starts at 9.30 am.
The interview itself was very smooth and fast, probably less than 20 mins. We arrived ~7.15 am for my 7.30 interview. There was already a line for checking in. It took about 10 mins to check in and probably another 30 mins to wait for my number to be called. I brought my husband with me, and the officer who interviewed me allowed him to accompany me into her office. However, I noticed that most of the other officers did not permit anyone other than petitioners to go into their office.
Once in the office, I took an oath to tell the truth, and the officer started with a reading/writing test. It is veeery straight forward. I was asked to read out loud the sentence: "Who lives in the White House?". And then write down the sentence: "The president lives in the White House". The officer repeated the sentence probably 5-10 times. It's very hard not to do it right lol And the next was 6 civic test questions. After successfully passing all tests, I was asked a few clarifying questions about my N400 petition, and the officer made adjustments. After the interview, they took my picture because the one they had on file was from my original biometrics from 2022, and after that, the officer handed me the oath ceremony paper.
Our case was very simple IMO, we didn't have previous marriages, no criminal records, no owed taxes. We also have a mortgage and a baby together.
Good luck, everyone, on your interviews!
P.S. During the oath ceremony, they take back all your green cards and other documents USCIS previously issued to you. Make sure not to forget even expired cards!