The best thing about this place is its location. It is very close (10mins by walk) to the main places you have in mind in the city to visit, such as Ponte Vecchio, palazzo Pitti, Uffizi gallery, etc.
The studio is pretty cozy, and has all the amenities you would need during your stay. The Wi-Fi works pretty well, the bed is comfortable, the bathroom is clean and nice (no bidet though).
The host is very supportive and kind, and the check-in process is very comfortable and easy.
Overall, I suggest this place for your stay in Florence, and I recommend you to take advantage of the suggestions of Barbara for what regards what to see or what to do in the city as a local.