When travelling I've relied many times on my credit card travel insurance and never had to make a claim. Since switching to Westpac I had a good read of the policy documentation and was surprised to see the following exclusion:
We shall not be liable to pay any claim under this policy resulting from: (a) Flood, storm, or earthquake;
This seems to me to be a significant exclusion and has made me think twice about using the card insurance for family trips.