Maurizio is a super friendly host, he replied quickly and gave a lot of useful information about Rome.
The apartment is situated in the nice dormitory area, it took me 45-60 minutes to get by walk to Vatican, there is a road through the park which is shorter, but at night I guess it's not safe, so I used then longer. Also I used buses, there is a bus stop just near the house, the buses go regularly and quite often. In 10 minutes walk from the apartment there is a metro station Cornelia.
The apartment is small but nicely decorated and clean. It was noisily at night because the road under the windows is quite full with cars, so I used earplugs to sleep. The room has the exit to the balcony. It's not allowed to use kitchen but I asked several time for dishes and Maurizio helped me. Bed was comfortable, and I was provided with towels.
Very near the house there is a nice market with vegetables and fruits, many positions there are much cheaper then in the supermarket. Supermarket and restaurants are near the metro.