We stayed there for 4 nights, in one of the more modern building (not the castle itself). We rented the studio and it's pretty small, even by french standards: the bed (double) is walled on 3 sides (!), the bathroom is actually a good size with a large tub (but no overhead shower head!). The kitchenette is functional but there isn't much beside pots and pants (no salt, pepper, oil...). There is a small table and sofabed (which when open will take all the space in the dining area).
Free Wifi was supposedly available in the room, but it turns out to the worst that I have seen in a long time, barely usable (provided by a service provider Noodo - avoid them at any cost).
No phone in the room, didn't try the TV (which was a tiny 22" flat screen thing). No room service for 4 days either!!!!
There is a covered parking (which should be great in winter).
The pool is covered and really long (50' at least), good for doing laps. The hot tub was cold, but the sauna was nice.
In the end it was reasonably priced for the services offered, but probably won't repeat tho.