Beckles, my primary worry is always the insurance. What's gonna happen if???. I do carry business insurance that covers auto rental. I do have an umbrella (cheap..$350. for 1 million $$ excess coverage.). And my insurer for my other car tells me that they cover rentals "exactly" as my insured car, as long as they are not both on the road at the same time. I don't really rely too much on the DC card because who knows what they may do. Still I worry about the insurance issue.