The location was excellent. It was very close to the Duomo, and just a ten minute walk to and from the train station. The river was also only about a ten minute walk. There were tons of places to shop nearby, including an outdoor and indoor market, and several cafes and restaurants. You have to walk quite a ways to escape the touristy places, but there is much to do nearby.
The apartment itself is also very beautiful, with a spacious room and an outdoor courtyard that is shared between two rooms and was accessible from ours. The was laundry available, and the bathroom had all of the necessary amenities, and was quite nice. Everything was very peaceful and quiet, despite its proximity to the heart of Florence.
Our only complaints were the drains. They drained very slowly, and the backups caused some unpleasant odors that permeated throughout the apartment. Given the age of the building, this might be beyond the control of the hosts, but it should be mentioned. It wasn't horrifying, but it was present.
Overall we enjoyed our stay, and we're thankful that hosts were able to graciously accommodate us on short notice. It was a good place to stay on a budget in Florence.