Castle itself is enchanting - explore at your leisure, although too many stairs to be accessible for patrons with mobility issues. Fabulous views. Even though we had booked a superior room with queen bed, they first tried to put us in a classic double - totally claustrophobia - then moved us to a superior with twins which we pushed together. Room was nicely decorated and had that medieval feel to it, but the maid was a disaster - mildew in the shower, exhaust fan clogged with lint, hair on the bedroom floor, etc. Bed was hard and so we remade it with the comforters under the bottom sheet. Only staff who speak English are in reception, if that is important to you.
Hotel is not really suitable for seeing Rome as there is a 2-hr commute by car, train and 2 metro lines.
Food in the restaurant for dinner was very good, friendly wait-staff, while breakfast is cold only with no fresh fruit but unlimited cappucino. The four dining rooms are actually one long room with 3 support arches.
Never found the pool or fitness center, but opened the door to the spa and was not enticed by the musty aroma to explore further. The hotel will rent you a robe for 3 euros and slippers for 1 euro if you want to use the pool or spa facilities.
The town is charming and there are a couple of decent trattorias within walking distance of the castle (down the hill), but the larger family one opposite the church is probably the best.
Go for the experience and not the luxury, and you will not be disappointed.