Alessandro is a gracious and easy going host. His home is eclectic with lovely little treasures everywhere that made me feel I was home. He very kindly printed out my boarding pass. Igor the cat is full of personality and very talkative, I really like her but do be careful if your not a cat person. The guest bedrooms are separated from rest of house so you have to go looking for her to interact. Unless of course you're making tuna fish sandwiches.
Transport: bus stop (#1A, runs every 1/2 hour) is literally less than one minute from his door. Bus #1B, about seven minutes from door is every other 1/2 hour. Bus takes 1/2 hour from SMN train station and about 25 minutes (including 8 minutes walk- no big buses in historic downtown) to the Duomo.
Accommodations: Wifi spotty but decent, kitchen has ample equipment. Only one shared bathroom for three bedrooms. Sometimes an issue most times not (really depends on other guests, if any, habits). I had the Chapel room with the 15th century frescoes of the Annunciation, for this American, they were enchanting to sleep under and a highlight of my trip. Room is huge, with a table, couch, three chairs, lots of counter space & gigantic wardrobe. I really appreciate the tourist info and electric kettle, coffee, tea & sugar in the room. Only drawback is the bed is a sofa bed, which shows clearly in his photo of room (but I was enamored with the idea of frescoes). I stayed eight nights and my back was not happy, however shorter stays should be no problem. Guests in other room said their mattress (real bed) was lovely. Pillows not great but that's subjective. Nice towels, sheets & plenty of blankets.
In summary, I highly recommend Alessandro and his home for your trip to Firenze.