We very much enjoyed our stay in Florence. The suite was clean and Mary&Marina are excellent at communicating via AirBnB messenger.
The suite is literally steps from the Pitti Palace and Gardens. We enjoyed the Pitti Palace but 39C kept us from the gardens in the mid day.
If you are thinking of staying just know:
1- it is on the top floor of a narrow stairwell. You will need to carry up your luggage. Our family only travels with a Carry On sized Backpack so it works well in these types of stairwells that are common in Europe. (I would rather do without a 3rd pair of shoes than spend my time fighting with a suitcase on a cobblestone street)
2- This July is record breaking heat and the air conditioning works well but takes some time if the room was empty for a few days. After climbing the stairs you will be extra hot. Be prepared that it will take a bit to cool down and a cold shower works well. Also the 2nd bedroom isn’t air conditioned; we left the doors open and that worked.