I stayed 3 nights in Firenze at Fernanda's BnB. The location is fantastic, just a 3 minute walk from the train station. Since the bus station is also next to the train station, it makes a day trip to Siena very simple. Fernanda was there to greet me and gave me a ton of information and recommendations of places to visit on a map. The room is very comfortable and clean. The distance to the main sights are all within walking range and I never took a taxi or tram anywhere. The other guests were very friendly too, despite our Italian-English communication issues.