The castle was all the we hoped for and more. The layout, particularly the living room (with grand piano) and the central staircase (with suit of armor) were fantastic--well appointed, lavishly decorated, and impeccably maintained, with plenty of books, games, and movies. The kitchen had all the amenities, including staples (we had brought our own, not knowing what to expect).
We were 10 adults and 7 children. Even though it rained all weekend and we were essentially housebound, there was plenty of room for us to spread out, play, and socialize. (Ours was a family reunion, so that's how we wanted it. It was perfect for us.) We even used the jacuzzi outside and the kids had fun sliding down the hill. The bedrooms were wonderful and the playroom upstairs was great for the kids. We also got good use out of the pool table, darts, and poker table in the basement. It was extremely comfortable and everybody loved it.
The owner was very gracious. He provided a one-page listing of restaurants, etc. in the area prior to our arrival. He was very appreciative of our treatment of the place (we were conscientious about cleaning) and happily and promptly refunded our deposit in full.
The location, despite being just over the border from Massachusetts, is fairly remote. The property is grand, with great views. Outdoor activity is your best bet.
I recommend mapping out directions very carefully in advance. We got lost despite having a navigation system, a printed Google map, and maps on an iphone. Some roads are minor or dirt, and not all systems recognize them. Once you know where you're going, it's not difficult.