Just saw it as part of a cinรฉma festival in Nice, the author of the book (which is based on real events) was responding to question afterwards. It's an adaptation, so some details are not exactly as they were, but it is really well done, it gives a good impression of what happened and how events unfolded, and overall a really good movie (actors are great as well). It could have easily been extended to two movies to go much more into details.