It is amusing to me how many people desire CK membership. Those that seem to want it are looking for an advantage to upgrades. I have found the CK service to be frustrating, expect more to get less! No real connection from ground to air. I have actually had FAs ask what is CK.

Here are the only real benefits in my mind:
1. boarding 10 seconds before everyone else, if the gate agent remembers of course
2. A free AA club membership
3. Access to the Flagship lounges (this is best perk in my opinion)

I do not remember the last time I needed an upgrade. I book all of my fares in first, since most of my travel is coast to coast and international. I tried AirPass in 2018 for myself a a couple other executives, which gave one CK membership, I decided to get out of Airpass for 2019. I was not personally offered a CK renewal, which is fine since there is no real benefit to CK, IMO. I am also an executive with 70 traveling employees, to say that I control a travel budget is an understatement.