We stayed there for one night, when driving back from Provence.
I really enjoyed it, although I'd not like to spend my entire vacation there.

However my fiancée was quite a bit a scared by the morbid atmosphere of the place and the fact that we were the only guests. That was my big chance of telling her spine-chillers about the princess that was drowned at the nearby river and now haunts the castle. Great fun!
The hotel (only a small part of the castle) is managed by the owner, who is about to sell the place. Some Korean sect already made an attractive offer as we were informed.
Therefore you'll have to try this hotel as soon as possible. Maybe it's already sold, I don't know.
What you get for your money is just bed & breakfast, no restaurant on the premises, and a guided tour of the castle (only some rooms). For dinner we had to go to town, but that's not far away.
If you decide to return to your room after 10:00 p.m. you'll get a code and have to use the hidden entrance through the cellar.

Our room was overlooking the river and equipped with some antiques a canopy bed and a huge mirror with some kind of mural painting above. There was also a fireplace but not for use. The bathroom was functional and spacious but could definitely use some redo. We both slept very well and appreciated the tranquillity at night.

Great Place!