Mayo Clinic strives to provide excellent medical care and patient satisfaction. I have been seen for various problems at Mayo several times. I have on a few occasions been seen by physicians who missed my diagnosis, or did not understand it, but even in those cases, I was treated with the utmost respect and care. As a physician myself, I recognize that they are human, and can make mistakes. I would overall rate the Mayo Clinic as the best diagnostic tertiary care center in the United States. I have no experience with other countries, but I will say that I have seen Arab-dressed foreign dignitaries with an entourage visiting at the Mayo, so apparently some think it the best in the world.