Amex vs Visa/MC - Amex had historically good flight/miles tie-ins (not as good these days), purchase coverage (returns, car insurance, etc), and concierge servi

Amex vs Visa/MC - Amex had historically good flight/miles tie-ins (not as good these days), purchase coverage (returns, car insurance, etc), and concierge service for higher level cards. Odd as it sounds, good reporting on billing, and a requirement to pay off at the end of each month, made it appealing to some businesses for corporate credit cards. Yes, we have both Visa and MC over here.