I stayed in Francesco E Marilena's place for 2 nights in December. I came to explore Florence as a single traveller for the first time. The place is certainly close to the main train station. I then walked to the city centre for exploring the city (takes around 15 - 20 minutes to get there by walking).
The room is big and spacious and has a lot of cupboards to put on your belongings. There is an elevator though it is a bit narrow. The toilet is shared with nearby rooms. The toilet and bathroom are clean, and I guess also cleaned regularly. There is a microwave oven to heat things and a fridge. The room is equipped with a water boiler. It is not possible to cook anything. There is a carrefour (supermarket) a few meters away from the apartment. Since I went in December, the room was a bit cold at night, but there were a lot of blankets. There was also a problem with mosquitoes however when I said it to the owner, I didn't have the issue the next night. The place is perfect.