The location of this apartment was perfect. Very centrally located so all the sights are walking distance. We didn't pay for public transport at all while in Florence. Also, on the note of people commenting that it was noisy at night we couldn't tell whatsoever. Perhaps it was the light hum of the AC that drowned out the outside noise but it wasn't a problem. On that note AC in the bedroom was great. You really understand the value of it when you cook in the kitchen which doesn't have AC and you realize just how hot it can get. The washer was handy, and there is a great, massive rack in the bedroom to dry your clothes on. We did laundry and hung the clothes just before bed and everything was dry by morning so we barely missed having a dryer.
The apartment is even nicer in person in my opinion than in the pictures. Really authentic feel by having the cool stone wall. Roberto, the man who greeted us when we arrived was pleasant and said hi to us nearly everytime we passed his apartment coming in and out of the building. I believe it was mentioned in a prior review that there are some stairs, but be aware for those of limited mobility this may pose an issue.
Also met Guido once during our stay for the collection of the city tax so keep that in mind when visiting Florence. We didn't need to contact him for any assistance but he was sure to message us each day to confirm that everything was going smoothly.
The only downside I found with the apartment was the WiFi connection only reached the kitchen/dining area (not in the bedroom, which I remind you was the air conditioned portion of the apartment). I assume the router device is kept in another unit which really made it unpleasant if you needed internet. The signal was also likely shared with other tenants because it became awfully slow at times. I could have dealt with the slower connection if there was solid signal strength. Depending on what type of traveler you are this may not be an issue.
Overall nice place, great location. Recommended.