The only problem when you have two project supervisors, particularly when one is in Germany and the other in France, is that it's easy for both of them to assume that it's the other who is doing the supervising.
"... apart from the excellent scientific training, what makes IMCB special is the fact that it brings together talented people from different parts of the world."
It's true for many of us, especially those of us who are first-generation graduate students, that what we do at "school" is foreign to a lot of our friends and family.