I visited the city of Florence with my three siblings - the accommodation was perfect for four people. As it was really hot these day we were happy about the air conditioner - unfortunately the "parents-room" did not get a lot of cold air because of its location. Nevertheless it was a luxury to be able to use three bathrooms, which was amazing.
Also we appreciated the location of the apartment, which is in walking-distance to all sights and the city centre. It's close to the train station as well so it's easy to catch a train to Pisa or anywhere else.
The communication with Edoardo and Michela was without any difficulty. Arriving at the place we had to pay additional taxes, but this is said in the description, so we knew about it before.
Summing up I can really recommend this apartment to groups of three to four people who want to explore the nice city of Florence.