Call the 866 number and tell them you want to send a thank you note to the sales rep who helped you on the phone. They can provide you the address to the rep center. I believe it's in San Francisco. I did this once to a wonderful lady who helped me a few times.
I'm glad you had a good experience, but let's get real people. They should ALWAYS be nice and courteous to their customers !!!!!!!!!!! It's their job!