My husband travels a great deal and uses the American Express platinum card for renting cars because of the no hassle aspect to damage claims, among other reasons. Last year I had an intimate encounter with a ridiculously tight entrance to an apartment parking area in the Albacin in Granada (if you've been there, you get the picture) and broke the side mirror and did a pretty good job on the side of the car. Upon returning the car, he signed a piece of paper and off we went. No problem!!

This is a pretty expensive card. If you can deduct it as a business expense, it might be worth it. Another way to look it, add up how much you pay per year for all of the extra coverage and compare it to the cost of the card. If insurance costs are anywhere near the card cost, it's worth it.