My family and I (7 adults) had a wonderful stay at Santo Spirito. Federico and Ilaria were very welcoming and efficient in the communication. The location is perfect, walking distance to main attractions, in a lively square with many restaurants and bars. The apartment is very comfortable, well equipped, clean and well represented on the photos. We highly recommend it and would stay there again on a next trip to Firenze.
A couple observations: the apt is located on the second floor and there is no elevator in the building and for those driving a car, there are limitations on the access to the Santo Spirito Square and parking close by is difficult and expensive.