Rental car insurance benefit from AMEX

This is a big money saver and peace of mind i believe. If we have a rental of more than 3 days this comes out cheaper as well as becomes the primary insurance. (bad i did not knew about this earlier) unlike other credit cards which offer secondary coverage

its 24+$ for a rental period and works across many countries while 17$+ for California residents.

https://www295.americanexpress.com/premium/car-rental-insurance-coverage/home.do?intlink=premiumprotecthub_browsepromos_pcrpmonitoring&inav=PROT_TRAVEL-Car_Rental

Liability is not covered but that's true for all credit cards and one can use their primary personal insurance for that. 

Good comparison of rental benefits across all major credit cards: http://www.nerdwallet.com/blog/credit-card-benefits/rental-car-insurance/