Gets-you-home insurance?

Do you have insurance that will get your family and/or rig home in case of emergency? Good Sam, or something else? What is the coverage, and what is the cost?

Have you ever had to use the insurance? Were you happy with the service?

I'm asking for myself, and because the issue came up in another thread so others might be wondering, too. It seems like it would be good to have one thread that lists all the choices people have found.