We are two older couples who stayed at Marco's apartment for five nights from March 19-24 of this year. This was the first time we have used Airbnb and our experience was excellent.
We communicated with Marco by email several times, and he always answered promptly. He was waiting at the front door when we arrived, and he even helped with the luggage. The location of the apartment is excellent as it is walking distance to many of the sites and also close to the metro. There are many restaurants in the neighborhood, and at least two bakeries within a block of the location. The apartment was as advertised --very clean, two very comfortable beds each large enough for two people. It has a small lift, but we never had to wait for it more than a few seconds.
We would recommend this unit very highly, and if we return to Rome we would definitely stay there again