July 17, 2014 5:33 PM EDT

GM CEO Mary Barra has been getting hit hard on Capitol Hill, but she has one really big fan, at least.

Billionaire investment mogul Warren Buffett was so impressed with his new Cadillac that he sent the GM boss a letter praising the company.

Buffett sent his daughter to the Cadillac dealership in order to get a good price and was delighted with how she was treated. The car saleswoman, Madison Willers, impressed the Oracle of Omaha so much that Buffett asked that she personally deliver the car to him.

Contact us at letters@time.com.

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