I had my prostate cancer treated at UNC-CH. It was a multidisciplinary approach, and I was very satisfied with the care and the outcome. No insurance problems, and I don't think my out-of-pocket was any higher than it would have been if I had sought treatment elsewhere. Yes, there is a steady stream of residents, but I didn't mind.
That said, medical care is like anything else: you, or a family member, must take an active role in managing your own situation. Don't outsource that responsibility to someone else! And to be successful in managing one's own care, one must learn a fair amount about one's own disease and the various treatments for it.