Marco's apartment is great. Bedrooms are all a good size, nice living/dining/kitchen area. The kitchen was well stocked with everything we needed to make some simple meals. It has great ac in each bedroom and the main living area. The one drawback, in my opinion, is the location. It is about 30 minutes by bus/metro/walking to nearly all the sites most people go to Rome to see. The neighborhood seems a bit rough, but we didn't have any problems.
Marco met us there and provided some snacks and cold drinks which were greatly appreciated. He was readily available the entire trip and arranged for drivers for us for a few things, at a reasonable cost and with nice, comfortable vehicles.