If you are staying in Florence, this is a great choice. It is not right next to any major attractions so you can have peace and quiet during the night. It is, however, close enough enough to the major attractions such that no car or taxi is needed. Best of all, it is just a 5 minute walk from the Florence SMN train station (take the east gate).
During our stay, the outside temperature was quite high (in the 30 degrees C). The AC to the build was not turned on for the season when we arrived. It was a bit stuffy during the first few days, but Martina worked with the building admins to get it turned on. On the last day the AC was finally working. Martina's communication was always very responsive, and kept us informed of what was going on. Other than this little issue, the apartment is clean, and the location could not be any better.