Please remember, you were dealing with the scheduler, not Dr. Chang. I also sent my MRI to several around the country. Dr. Chang called me personally, was very polite and informative with no pressure at all. He answered all of my questions. He is so kind, don't dismiss him because of the rudeness of the front line personnel. Many of us here went to him, especially since that is where the CK machine was developed and they have the most experience and provide so any research papers.
It is a well run program. Dr. Chang continued to answer all my questions by phone and email promptly, and never ever seemed put out...even though I'm sure the questions are asked consistently.
If I were you, I would put together a list of questions and email him and tell him you would like to speak with him. I liked the fact that he not only performs CK, but also surgery. He does 50-50 as far as the AN's, so I know he is not pushing just for one. The experience there was easy-peasy, you will be in good hands. I know others here will agree and give you there opinions.
Good luck...deciding is such a hard part. Also....it's in Palo Alto...I called it my AN vacation. I was only in the hospital 10 hours max that week (wait, prep, actually CK). The rest of the time we toured SF, Monterey, Sausilito, Muir Woods, having wine on University Blvd. It was a wonderful week with DH and no kids. You can still drink while having CK! I wore my Stanford T-shirt walking yesterday. I've had people ask me if I've been to Stanford and of course I have to say, "I DESERVE to wear this T-shirt"!