The only part of my experience that was different from what most people report was an almost hour-long interview. There was no problem (other than with the officer's computer and fingerprint scanner), and the officer spent much more time discussing the program compared to what other people have reported. In retrospect, it appeared that the officer was waiting for some acknowledgement from the computer (maybe related to the fingerprint scanning)
Same here, although it wasn't anywhere near an hour (maybe 20 min.). The fingerprint scanner was slow to accept one set of prints, so time had to be filled while waiting for a confirmation. Fortunately, the officer said mid-interview that "now that you're approved, you can start using ...", so I knew that the length of the interview was more chit-chat than assessment. Overall, very pleasant process.