Overall my husband's interview was a good experience. We got there early, went through security and waited for a while before we were called to the first window. I was nervous about the proof of domicile for the I-864 since I had not looked for employment or houses in the US yet. I took a supporting I-864 form from my mother just in case but we did not need it in the end. They asked my husband what job he worked in and they accepted a copy of the notice letter I sent to my employer as my proof of domicile. Otherwise the woman just asked general chit-chat questions while she checked the rest of the paperwork. Then we paid the visa fees around the corner and waited to be called by the immigration officer. He was a laid-back bloke who asked how we met and what my husband did for work. Then he said that he had checked through all of the paperwork and it looked good so he was going to approve us! My husband had to say an oath and then that was it! We paid the postage for our visa to be delivered and got it the next week.