The Pros:
Apartment is in a great location. Right across the bridge from the heart of Florence, but in a neighborhood that's a bit quieter. This is exactly what we were looking for.
Apartment is a good size and well decorated. When we arrived it was very clean.
The Cons:
The building is dark and a bit dingy - could use a dusting and a fresh coat of paint. Apartment itself is very clean - just walking into the building can feel dark and tired.
Apartment is up 3 long flights of stairs, which can be difficult with luggage or after a long day exploring the city. Also there are numerous (I think 4?) different doors to get into the apartment and the locks are quite tricky to work sometimes.
Shower is quite small - can make it hard to shave your legs or if you don't want to get your hair wet.
Not the most comfortable bed, but not too bad.
Overall, if you value the location I think the pros outweigh the cons because although the building has some challenges, the apartment itself is a great place.