We rented the apartment for 12 days over the New Year holidays and thoroughly enjoyed our stay. There were three in our group and the apartment was perfect... And could have accommodated one more person easily. The apartment was spacious, comfortable and well appointed (and tastefully decorated). Not only was there shampoo and soap, but fruit and snacks. The beds and bedding were comfortable and the towels were big and soft. The kitchen was efficient... we cooked 3 dinners. For a winter trip it took awhile to warm up the apartment, but once we got it to temperature, it was very comfortable.. For summer travelers, there is AC. The apartment is on the third floor (4th for Americans) and there is an elevator up to the 2nd floor.
The location was almost perfect... the only thing that would have made it perfect would have been a view. It is conveniently located within a 2 minute walk to Santa Croce, 10 minute (slow paced) walk to the Uffizi and Piazza della Signoria and 15 minutes to the Duomo. The neighborhood is surprisingly quiet for the central location. There are good cafes for a morning cappuccino and excellent restaurants nearby. Also there is a supermarket around the corner.
We would highly recommend this apartment for anyone visiting Florence. It is comfortable, quiet, well located, and the hosts pay attention to the little details.