Just got to use pre check for the first time away from ATL. Went through at T5 in LAX -- was great. The sky priority line is basically non-existent now...walked right to ID checker, 3 beeps, bags on belt and through. From the time I stepped off the bus it took literally 3-4 minutes to gate.

Also learned that making changes within 72 hours does not seem to negatively effect your ability to get pre check. Was originally supposed to fly tomorrow, but changed it yesterday to come home tonight. Very nice.