We had a very pleasant experience with Matteo and a very pleasant experience at the apartment.
Matteo is a cool guy, jokes a lot and is very helpful in providing a lot of information (e.g attraction points in Florence and Tuscany, restaurants, etc). When we arrived he offered us bruschetti (made by him) and a bottle of wine. He also offered to prepare a dinner for us (with his friends), but we couldn't attend.
The apartment is located very close to the old city (5 min. walking to one of the city gates) and close to a supermarket (2 min.). The apartment is very nice (has the owner's personal touch), really clean and well equipped.
Overall, a great experience.
Thanks Matteo.