My friend and I stayed at Marco's place for one week and had a great time there. Marco was friendly and helpful! The apartment was bigger than we had expected. It was clean and we had everything we needed. The street outside is quite busy but since the windows are really good we didn't hear anything. The A/C was good, too. The apartment is not in the city center but the metro is close, there are many bus stops and public transportation in Rome is cheap.
We can really recommend this place! Enjoy!