I have cheap car rental (for travel to visit family several times a year) figured out. But we never pay for insurance, which we don't have bc we don't own a car, and it makes me nervous. I have some protections through my Visa, but I've heard that the best car rental credit card related insurance is with an American Express. Is this true? If so, do you think it's worth it financially? I assume there are annual fees involved with the card.