My home airport is RNO, where there are no GE interviews. In Feb., I had a flight to LAX, and tried to schedule an interview either there or in Long Beach. To my surprise, no appointments were available at either site on the day of my flight. I tried to do a walk-in at LAX, since I had left my entire morning open for the interview, but there was a sign saying "no walkins" and, just as I read the sign, an officer saw me, and confirmed that they wouldn't take mercy on me.
Fortunately, I was able to schedule another trip to ABQ in March, and the schedule there was wide-open. I was able to schedule easily, and arrived at my appointment an hour early because I wanted to be sure I'd returned my rental car and checked by baggage for the flight home, and had been anxious about getting to my appointment on time .
I signed in, and settled into the waiting room with a book to read, but an officer called me back an hour early, since I was there.
The interview was brief and simply confirmed information on my application, I was photographed and fingerprints were taken, and then the officer told me that I'd received a card in the mail in about two weeks. Within a few minutes, I'd received an email informing me that my application status had changed ( with a code to enter when making airline reservations), and the card arrived in the mail within about 5 days!
Cudos to the staff at ABQ! Couldn't have been nicer!