What were your opinions on the Battle Chateau?

In X and Y did you ever do the Battle Chateau during your playthrough? And what did you think of it? I really liked it, it was a good way to get some levels especially the "Audino Trainers" and some money once you get the Amulet Coin and a high enough rank. Plus the "Challenges" you could send out made more trainers and even eventually Gym Leaders show up.
Definitely love to see it or something like it come back.