Out of 6 AirBnB's on our trip to Europe, this one was the gem. The hosts are unbelievably organized and provide all of the you need and more. A couple things to note:
Italy is warm in the summer and most AC units struggle to keep up. I highly recommend bringing a small fan if you are used to sleeping in a colder room.
This apartment is located up several steep flights of stairs. Leonardo very willingly helped us with our luggage upon arrival. That said, if you have trouble on stairs this apartment would not be for you.
There is a laundry "man" next door. He is a bit rude but he is affordable and washed/dried a couple loads in 24 hours. We found this to be very convenient.
Lastly, eat as much Florentine steak as possible! It's unbelievable.