I would add that you have membership privileges and can use these lounges regardless of airline flown. This is in contrast to say the Amex Plat which requires one to fly the airline that day in order to have access. Also, you can use the partner lounges as spelled out via the link. Notably certain AS boardrooms when flying AA (not when flying AS) and Qantas. You do not get a membership card but instead have the Admirals Club logo on the back of your credit card. I would imagine the lounges less familiar with this procedure may require some explaining (there's a post somewhere about AS boardrooms not immediately granting access). Strangely your Aadvantage number is not printed on the card despite the fact that it is on the lowly Plat version. Very odd if you ask me!