Staying in a castle was a wow experience. That said, the deluxe king room was so cramped that we had to upgrade to a suite to accommodate the luggage, so don't arrive with more than a toothbrush! We arrived by rental car, and given that there is no driving within the Cite walls, locating the hotel parking and free shuttle was a bit of a challenge, especially since both ends of the access road are marked "do not enter." But once ensconced, the hotel grounds were fabulous, the service was good (provided we spoke French), and the location within the castle walls was incomparable. The cooking at the one-star Michelin-rated restaurant was superb (what a dinner!), although the waiters behaved like scared rabbits and at times seemed a bit confused, which detracted from the experience. The next morning at breakfast, I had to call into the kitchen to beg for coffee as no service personnel was present for over 15 minutes (and this at 8 am). BUT the breakfast spread was lovely, abundant, and very tasty, so all was right with the world.
All in all, a remarkable experience.