This is not a castle. It has been well photographed from afar to make it look like one, but it is clear upon arrival that there is a small original manor house that has been extended, probably in the twentieth century, with concrete breeze blocks and a castellated top to make it look like a grand stately home. No amount of ivy climbing up the facade can conceal the fact that it's fake. It has the ambiance and outdated furnishings of a jaded country pub. They have a throne blocking the entrance so that gullible Americans can have themselves photographed in front of a 'genuine castle'. It's a joke.
There was no one at reception when we arrived, only a car-crash of a messy office on full display. If this place were to have an inspection tomorrow, it's 4-star ranking would be reduced to 2. It claims to have a 'spa', but in fact only has a massage room. Evening 'entertainment' consists of a man playing the piano and singing out of tune. The TV didn't work.
On the positive side, the bed was very comfortable, the staff were extremely friendly, though occasionally hard to find, and the breakfast is very good. And the grounds are quite nice and, of course, the surrounding countryside is breathtaking. So, if you ignore the fact that it's pretending to be a castle, it's a perfectly reasonable place to spend a night.