Had my interview today in the SLC Field Office - arrived 15 minutes before interview time in the letter, taken back by the USCIS officer 30 minutes later (15 minutes after scheduled time).
Answered the first six questions correctly, read and signed some stuff on the tablet, all he looked at was my green card and my Utah photo ID, and flicked through my file.
Asked the normal questions (no, no, no, I do, I do, no, no, etc 😄), had some small talk amongst it.
Out the door 45 minutes later - no document to say that I was recommended for Naturalization as the printers were broken 🤨
He said that I should get notification of my ceremony date in 2-6 weeks. Just checked my.uscis.gov, and there's the confirmation that I should get a letter within 30 days.