Very convenient location with close walking distance to and from the train station but we found it to be a very noisy apartment on the 2 nights we were there. People from other apartments coming and going past the front door all hours of the night with voices raised at 2am and a lot of noise from the Street and from over the back of the apartment so if you want a good nights sleep this may not be the apartment for you!
Bathroom is a great size but the remainder of the area is not as big as it looks in the photos. The front entry photo is the main entry for all apartments so not part of your space. The kitchen facilities are very basic but ok although more than 2 coffee cups would be good!
The apartment is certainly convenient to the train, shops, restaurants etc. so would be fine for a quick stopover in Florence.
We did a full day tour through Viator called The best of Tuscany which I would really recommend if staying in Florence as it was great and the pick up and drop off is near the train station so this location is great if you are planning on doing that.