Booking through Amex Travel absolutely ruined my trip. I booked a ticket with Amex travel 6 months prior. The flights showed up on my American Airlines app and everything looked good to go. When it was time to check in with American Airlines for my one-way trip, I got a weird error on the app saying my flight reservation didn't have a ticket. This was odd since my upgrade had already been confirmed. I called Amex Travel Platinum desk who advised that my ticket was never issued despite having an airline record locator and showing up on American Airlines app.
Long story short, I was on the phone with them for over 4 hours. I had to buy a new ticket with Spirit Airlines since all flights with American Airlines were now full. Amex Travel ruined my trip and deprived me of a day and a half of vacation. I don't even understand how a company like Amex Travel doesn't have systems in place to prevent my situation from like mine from occurring. Do yourself a favor and only book direct with the airline!