Carlo is amazing and helpful, the apartment is perfect, clean and it seems to be recently renovated. It's very spacious and accommodating.
Carlo and his wife also filled it with full kitchenware, clean towels and sheets.
You also feel very secure with the four books on the door, even though I didn't think there is a need, the apartment I'd in a very quiet and peaceful neighborhood.
Location was very good, with very easy and short bus routes.
I would definitely return to his place again if I'm in Florence.