This was our first use of AirBnB. It was an excellent experience. Bruno was very good at initially communicating with me on the reservation. Once we arrived in Florence then his son Luca took over. He met us when we arrived and showed us the apartment. The apartment is on the 3rd floor. There is an elevator. Its a little temperamental but it worked fine. The apartment is just like in the pictures. It is clean and spacious. Very nice. The first day there you do need to get some supplies like paper towels, salt, sugar, bath soap, shampoo etc.. If you have used AirBnB before then you probably know this, I figured I'd mention it for any newbies like we were.
Luca gave us a map of the area and pointed out the grocery store, gelato shop, and some nice restaurants. He was very helpful throughout our stay. Very responsive to my texts or calls.
The apartment is centrally located to most of the major area visitors will tour. We used a taxi once or twice. At night the street by the apartment is well lit. The area was pretty quiet. Once in a while you would hear someone yell or garbage being picked up.

I highly recommend Bruno's apartment. We had an excellent experience.