I have only one experience with CNDC, and no experience with Christiane directly, but several people in my area have fairly extensive experience with her. I’ll start with my own experiences.
I attended a CDS clinic there last fall. She offered use of her facilities but was not actively involved in any other capacity. The facilities are beautiful but not very friendly. If you’re looking for a close knit atmosphere, you won’t find it there. It was also very spendy - for clinic stabling, we were charged the full weekend (Friday night, Saturday night, Sunday) show rate for one day and one night.
The experiences other people have had were less than favorable, most revolving around money. The general consensus seems to be that unless money is no object for you, she’s not particularly interested. Several people have stories of her walking out in the middle of lessons to attend to more “important” clients.
I know very little about her actual training or teaching techniques or prices. She might be a good fit for you. Take what you will from what I have said here…like I said, my firsthand experience is super limited, and the rest is one side of the story. Good luck!