I had the TSB done my '20. I wonder if they missed something, they only had the truck about 6 hours (they also worked on seat [couldn't fix it], checked the brakes ["Didn't want to throw parts at it"] - not fixed, fixed door latch, updated transmission, and updated backup sensor). That seems like a lot in less than a day compared to what others have stated about the time required for just the AC TSB. The air coming out of the vents on a 92* day is about 57 on both sides, though there may be a bit more airflow than before. I just dropped it off at the dealer this morning to take another crack at those things. The service manager came out of his office and berated me for giving them a negative response on the survey (effects his pay, makes him look bad etc etc). Sorry to vent (pun intended), just not happy with my first Ram and the service that comes with it.