My wife and I stayed in Sofia's flat for four weeks in March of 2022, and the experience was quite incredible. Sofia is a warm, attentive, and helpful host, and the apartment is simply remarkable. It's even more beautiful and downright luxurious than what you see in the pictures, with beautiful woodwork and period detail in all rooms. (The soaring ceilings -- the kind you usually find only in mansions – actually have frescoes! Even in the bathroom!!)
We never had any issues that required a resolution, but Sofia was very quick to respond even to general inquiries about things like pubic transit options. I am sure that if we did run into any problems, Sofia would have them resolved right away.
The apartment has everything you may need for a short or long stay, and, of course, it's very clean and in perfect condition. In fact, it is by far the best-equipped AirBnB rental we've stayed at. Sure, most AirBnB rentals have a washing machine tucked into a corner in the bathroom or under the counter in the kitchen, and there is nothing wrong with that. But Sofia's flat kicks it up a notch with a spacious laundry/ironing/storage room in a finished basement that has a taller ceiling than most residential apartments.
The kitchen has high-quality appliances and everything you may need to cook the most elaborate meal. Add to that original artwork, elegant and comfortable furniture (including the bed, which was excellent), an impressive library, and an attractive and spacious private terrace for eating or just relaxing. (A second, smaller private terrace off the kitchen is great for drying your laundry.)
We chose this neighborhood because we did not want to stay in a super-touristy area, and the experience was exactly what we expected/hoped for. Our navigation apps suggested that the apartment was a 25-30-minute walk from the city's historic/cultural center, but we never tested that: riding a regular bike cuts the time in half, and Florence has a cheap bike-sharing program (Movi), with plenty of bikes to be found throughout the city. Sofia's apartment is located inside Movi's bike rental/parking zone, so I was never more than a 2-3 minute walk away from an available bike. A 30-day promo pack gives you unlimited rides on Movi's regular (non-electric) bikes for only €12.99, which makes the bike sharing program the cheapest and most convenient way to get around Florence. (Electric bikes cost more, but in my opinion, you don't need one to get to the city's historic center or travel within it as long as you are in half-decent shape, since there are no real hills to conquer on the way there.)
We also made regular use of ZigZag, an electric moped sharing company. The mopeds allow two slim-to average-size adults to ride together, which can be a great option if one of you is not comfortable riding a regular bike on city streets: while Florence has many protected bike lanes (and quite a few more that are not protected), not all of them are connected, so you will occasionally have to ride with car traffic for short stretches. At €29, we found ZigZag's 24-hour pass, which can be used over two consecutive days, to be the best value. (Note that if you've never ridden a moped or motorcycle before, learning how to do it on a rented moped in a new city with busy traffic and many one-way streets may not be the best idea.)
There are several bus stops within easy walking distance (the closest one for going to the center is only two minutes away from the apartment), and the Campo di Marte train station is only 10 minutes away.
We did not have a car, but it looked like finding a parking spot could be quite difficult and possibly expensive, especially without a residential sticker. (Moped and motorcycle parking, on the other hand, is free for all and fairly plentiful. We never had any trouble finding a spot for our rented ZigZag mopeds.) Check with Sofia about parking options if you plan to have a car with you while you stay in her apartment.
Because you'll be staying in the city, you will hear some traffic, but we found that it was more white noise than the kind of noise that was annoying or that could prevent us from getting a good night's sleep. (Neither of us is a heavy sleeper, but we never had any difficulty falling or staying asleep during our four weeks in Florence.)
In short, staying in Sofia's flat was a terrific AirBnB experience. When we come back to Florence, we'll definitely try to book it again.