We stayed at Marco's place for one week. Marco waited for me, even though I was half an hour late. Very nice of him. He showed the apartment, answered all my questions, send me map locations for nearest markets and shops.
There's a bus stop right in front of the house, from where you can go towards subway station and city centre. You can also go on foot, it will take you 15-20 minutes to get to the subway. Also really convenient that there is a bus stop from/to Fiumicino airport in 15 minutes from Marco's place.
The apartment was clean and comfortable. We visited on January, but the place was equipped with air conditioning, so it was warm. At our disposal was well-equipped kitchen, a huge bed and a couch, bathroom and a small terrace that will be perfect during summer stays.
Thanks to Marco and his place I've enjoyed Rome even more. Would totally stay more, definitely recommend to anybody who's going there.