Haven't heard much! Bought the box as a "speculation". I've attended performances of Dialogues des Carmelites, which I greatly enjoyed, and Voix Humaine, which I disliked but for non-musical reasons. Expect to enjoy Stabat Mater, ...Carmelites, piano and chamber works. There are a lot of vocal pieces, mainly songs, which I doubt I'll care for. But the box was cheap enough to be worth a try. I like what I've heard so far, mostly piano and 2-piano works.
I'm somewhat of a Francophile when it comes to classical performances, but French composers are under-represented in my collection.