I think whats got everyone confused is the differences in Lounge benefits between the regular AMEX Platinum & the Aeroplat. The Aeroplat doesnt get you into the US airline lounges & only into the US/Intl Servisair lounges if you bother to get the free membership & then pay the $27entry.
This difference is poorly communicated (like not at all) in the AMEX literature or on the website
Am I correct on this?