I have a couple of comments:

1. I would always try to reserve with the restaurant directly. If that failed, and Amex always was unable to secure a reservation, then that would be a good indication that it was a nonesense benefit.

2. Can anyone explain the difference between "Fine Dining" and "Hot Plates?" I've read and re-read the descriptions, and although there is different wording, I can't for the life of me figure out what the actual difference is.