Great location in the Santa Croce area! We took a tram from the airport to the train station, then a (tiny) city bus, which put us very close to the airbnb. Very easy to walk to everything, and even stop back at the apartment to rest, or pick up / drop off things. Close to Santa Croce, Piazzale Michelangelo, Palazzo Vecchio, etc (Florence is a very walkable city). There was a little fridge (great for leftovers) and a little kitchen, and great food and bars nearby. Ground floor (no steps), but not too noisy.
Alessandro was wonderful - we did not meet, but he was very responsive via text and phone, and gave us some good recommendations for the city.
The apartment itself was very cute, clean, and well maintained. I would definitely stay at this this airbnb again!