Marco is the best hostess in airbnb I have ever seen. His place is just amazing, he has so many tips and recommendations for you to do in Florence. And also he goes the extra mile.
The only thing to consider its that is not walking distance to the center of Florence, its like 20-25 minutes away walking, bearable but just to consider because Uber its not available and in some times the taxis are not available right away when you give a call. That shouldn't be a stopper for you to book but a consideration when you're planning your trip.
And this room have all the accommodations you need, tv, air conditioner is like a heaven where you recharge. Definitely consider this place when you visit Florence.