Chiara's place is great for a short stop over in Florence :)
My only issues would be that the location and neighbours are quite noisy, even on the weekend, and the walls are very thin, so you can hear every move.
The sofa-bed was quite uncomfortable as the mattress is a bit thin and lacking in proper bedding - it got a bit chilly with just a single top sheet for cover.
Otherwise,there's not a whole lot to do in the vicinity of the apartment but it's close enough to public transport and it's easy enough to get to the city centre from there.
I would recommend staying here for a short trip if you've got a lot planned to keep you busy :)