If you are to stay here I recommend buying the CIS 7 day pass for €24 for all transport if you wish to visit Rome centre as you will need to take two or three metros to reach it and it will save you a lot of hassle and money.
The apartment was fine, however he tended to be a bit late, for example we had a problem with ants the second day, contacted Stefano, who said he would arrive around 2. We left the apartment and came back at 6pm, there was no change to the ants. We were getting ready to go out, I about to get into the shower at 7pm when he arrived with bug spray. I couldn' take a shower and in the heat it was very annoying. We had to use the spray a few more times during our stay. My advice is if you need collecting, tell him a time half an hour earlier.
Aside from those few problems the apartment was lovely, good value for money and Stefano was always very good at responding to our messages.