We also stayed at Castello di Casole a few weeks ago. Here is a cut and paste of my review on another site. Our room looked to be identical to yours except we had a small outdoor space, a fireplace and a full size free standing tub. We initially booked under a Virtuoso rate but changed to Luxurylink since it was quite a bit cheaper and included quite a number of other additions.
I didn't find the service to be all that great, but otherwise it was quite a good stay.
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The physical hotel is amazing. Easily one of the nicest properties I have ever been too. It is gorgeous, well maintained and the views from their pool and balconies are spectacular. Everything is newly remodeled and wonderful.
We spent several nights at the Castello in their standard room. We asked for a view and were given a nice room with a balcony and a view of the countryside. The room was very large with a fireplace, nice seating area and a very comfortable king sized bed. The room also had a gorgeous marble bathroom with a marble walk in shower and a large soaking tub. The bathroom had dual vanities and was gorgeous. The room had wifi which was fast, satellite TV and AC (which worked decently well - luckily it gets very cool in Tuscany at night).
We used the spa for a treatment in one of the couples rooms. The spa is gorgeous and just opened. It has some small service issues to deal with but once they are fixed it will be amazing. The facility is gorgeous and it has mens and women's locker rooms. The showers in the spa were nice rain showers, though I prefer a more private shower - these were open. The men's are had a cool and hot tub for soaking and relaxation. The couples suite was unreal. It was in the old wine storage area. It had gorgeous arched ceilings, a beautiful couples tub, shower and other facilities. Very nice. Our treatment included a soak, but oddly no towels were out to dry off (one of the small kinks to be worked out). The massage itself was excellent.
We ate dinner at the hotel one night and it was very good. Some of the food is skewed for American tastes but we had a wonderful fish dish and a very nice steak and some wonderful pasta. The food was great and service was very good.
Breakfast was served each morning in the hotel's restaurant. It is a buffet but they also have eggs on order and pancakes. The buffet was large but the food was only ok. For instance, the baked goods didn't seem freshly made but the omlettes they prepared to order were nice.
The highlight of the Castello is the pool area. They have a gorgeous large infinity pool overlooking the countryside. The service at the pool was good and they had food and drink options. We enjoyed spending a few hours each day at the pool.
Our only real negative was the service we experienced. It was decent but not great; it was not proactive. For instance, we came back from dinner one evening and it was pouring but no one was at the hotel front to get us from our car and give us an umbrella. Most hotels we stay at would have someone waiting. Other instances are that we never really got hellos from staff.
Overall, we think the hotel will improve as it ages and we will likely stay there again on our next trip.