[devilbunny]

> mini-background check when you apply for the program.

You'll get fingerprinted, etc., and while it's nothing like a serious security clearance, they do look you up rather thoroughly.

Note: my only direct knowledge comes from applying to Global Entry, which is a pickier program, but Precheck does collect biometrics (at least facial and fingerprints). Global Entry was around 15 minutes for the interview process (both formal and informal; I knew the two guys outside the interview and fingerprint room didn't really just want to talk to me to pass the time), but that was a decade ago.

One interesting anecdote from my interview is that I was told that the #1 reason Global Entry applications failed at the time was that one of the questions was whether or not you had ever been arrested - not convicted - and people would say no. Not an auto-disqualifier to have been arrested, but lying about it was.