Andrea and Nastya's place is really cute, modern, and updated. Check in was very easy and the apartment is accessed through 2 key boxes. My sister and I felt very safe during our whole trip (2 females in our late 20s). Airconditioning and wifi were great. The bed was just ok, it's 2 single beds pushed together instead of a real queen bed. The bathroom is basic but nice, small (very common for Europe and Florence) but it has good shower pressure! Andrea and Nastya are also very friendly/responsive and gave us some good food and bar recommendations!
25 min walk from the main train station
10 min walk from Duomo
15 min walk from Ponte Vecchio