To start with the good points...The home is in a good location, walking distance to all of the sights in Florence and it is big enough for 3 (but the single room does not have AC). It is outside of the ZTL so you can drive and park. Communication was quick with the host.
However for us the bad points heavily outweighed those. The apartment was dirty upon check in, the apartment had been given no more than a cursory wipe between guests. There was a heavy build up of grime in the bathroom and in the kitchen the oven and fridge were covered in grease and grime. The baking tray was hidden in the store cupboard and was full of burnt food. The washing machine had mould in the door. We sent photos of this to AirBnB.
The air con units both broke on us - this was not the host's fault but they could not be fixed whilst we were there.
We are not usually ones to complain but we checked out before the end of our stay (without charge from the host) and separately got a refund from the AirBnB resolution centre cover the cleaning fee and some costs of the accommodation.