No credit card gives you the full coverage you need, even while renting in the US. The vast majority of these companies lead people to believe it's all you need to protect yourself. Not even close although it can work in conjunction with your personal policy.
Also, make sure you get the tire and wheel coverage. Almost every American hit's the curb with the front left tire because of driving on the opposite side of the road. Without this extra insurance your on the tab for a new wheel and maybe tire. It's the first thing that look at when you return the car.
What is the full cover you need that the card does not cover?
Ah ok. Not too bad then
Just a quick FYI - visa signature (and infinite) cover tire/wheels. That was actually one of my claims they paid after I ripped open a tire on barbed wire on a narrow country road in the UK.
Between the first class and economy seats on a flight to another country, I would pay the insurance provided by the rental company in a foreign country, regardless of the credit card coverage.
I believe when I arranged the rental online it already included the insurance. We ended up having to cancel that part of the trip for other reasons. Prepaid but completely refunded.Paying the insurance at the rental desk will more or less double the cost. It can be quite shocking.
What I saw quoted looked like it did cover the full insurance minus some deductible.Often the booking includes the minimum legal requirements. Then you arrive to pick up and have your bill doubled if you want collision cover.