X2 on Larry. Get online or on the phone and learn the details of the Amex service. I'm sure that Amex contracts with some motor club or other vehicle service provider, possibly some of the same vendors used by CoachNet et al. The difference will be in the coverage details.
John & Diane, fulltiming since '12
'02 DS, FL, Cat, '04 Element
John and Diane (RIP Lincoln, 21 FEB 22) RVM103 NHSO
Fulltimers since June, 2012
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element