We had a great stay at Marco's apartment. The biggest advantage is definitely its location close to Circo Massimo and the Colloseo. You need about 40 minutes to walk downtown. It was spotless clean and very spacy (for two people) and had everything we needed. Marco left us some wine, soft drinks, water and snacks which were highly appreciated. Note that the apartment is located next to a main street on a higher ground floor. It is relatively quiet for being that central in a multiple millions of inhabitants city like Rome, but you should not expect countryside silence. There is space for 4 people, whereas two of them would have to sleep in the upper open space above the living room/kitchen. Marco was easy to communicate with and very caring. His dad who welcomed us and explained everything was too. We would definitely recommend this apartment.