I love this fic. Very deep, and dark. I agree, there is YMMV on the end. I personally was not a huge fan of France being the cause of every bad thing and thought that this ending was not worked into the story well, and almost a complete blind shock, but nevertheless the story is absolutely compelling.
Absolutely hearbreaking. The plot is so intricate, yet very easy to follow. [[spoiler: The emotional depth of almost every chapter is insane. Just when you think things are going great, everything turns to sh*t. And then... It Got Worse.