"I very much enjoyed being coached by Christopher for my talk at TEDxHambourg 2016. Christopher is really good at finding the little things in someone's presentation that, when changed, really make the difference. He can give both general advice and precise, concrete suggestions. His help was priceless. And plus, Christopher is always good-humored, smily, and fun."
Further information on Hélènes project "Tree of life": http://ideas.ted.com/a-newly-drawn-tree-of-life-reminds-us-to-question-what-we-know/
Have a look at Hélène's TEDxHamburg Talk here.