Matteo is an incredibly nice host and accomodated all our needs. The apartment is charming and spacious although not very soundproof. It is a quiet neighborhood right behind the vatican which is right in the center of Rome which allows for walking to some of the sightseeing spots easily. Super close are the subway station Cipro, a supermarket and a pharmacy.
We arrived early and Matteo let us deposit our luggage in the apartment while we headed out for a first exploration of the city. Since the supermarket right around the corner is open until 9pm we were able to spend all day sightseeing and return in the evening to buy groceries, cook dinner and enjoy it on the small but cute and quiet balcony.
Overall, we can definitely recommend a stay here as long as you don't plan to party in the apartment but just enjoy a quiet accommodation in the city center.
P.S. Food recommendation: the pizza place "Bonchi" which is also right around the corner :) be sure to pick a number on a busy day ;)