If, strictly speaking, the term "luxury" refers only to the lodges, then unable to comment further; however, if the self-service accommodation within the castle building is also included then the term should be taken with a pinch of salt....
The castle and the surroundings, of course, exude luxury and make for a memorable and thoroughly enjoyable stay, but the apartment we stayed in did not fully live up to this: although it benefited from many comforts (and not just the basics), cleanliness and maintenance left a lot to be desired, the drive leading from the main road to the castle is full of potholes and the noise from the main road is surprisingly audible. The "Freeview Smart TV" only had a handful of channels possible to watch (but, at least, there was also Netflix available), and although brochures are helpfully `provided` (or maybe just left behind by previous travellers?), they are mostly outdated and partly useless.
Nevertheless, housekeeping/the manageress is responsive and helpful, and none of the above could lessen the appreciation of what the area has to offer or would make us hesitate to return.