So I had been conditionally approved on 6/23 and immediately started looking at my local office (Tucson). Next available appointment was 7/6 at the time (Phoenix was worse). While perusing other Arizona locations such as Nogales, Douglas, and San Luis since they were offering next day availability I noticed that a time slot on 6/25 opened up in Tucson so I immediately grabbed it. I think someone else rescheduled or cancelled while I was perusing locations.
I was early, started my interview after a previous applicant was done, and finished before my scheduled appointment time. Less than five minutes.