The place exceeded our expectations in every way, Claudio and Maria should definitely charge more. First of all, the view. It's probably the best view in the city. If you only have one or two days in Florence and don't feel like spending the precious time standing in line to climb a tower, the view from the spacious terrace is probably better than from Piazzale Michelangelo.
One reviewer mentioned that there's not much high tech here. I'm not sure what he expected, but we found exactly the opposite. Both of the rooms are equipped with split systems and a smart heating system. The room temperature was comfortable throughout our stay, and it was down to 0 degrees outside. The Wifi was stable and high speed. The kitchen's fully equipped with everything you can think of.
The checkin was friendly and efficient, and self-checkout's very convenient if you leave early. Can't really think of anything that I didn't like about this place.
Would definitely stay here again. I'd go as far as checking if the apartment is available before booking my plane tickets.