We had an extended stay at Giovanni's apartment for 12 nights. The location is very central and virtually all the main attractions in Rome (museums, monuments, etc) are within walking distance.
Giovanni arranged a pick up from the airport for us, which took about 45 min; this was useful as it was our first time in Rome arriving at Fiumicino Airport. There is also a tram line very near, which goes to Trastevere Station, with an easy transfer to the regional railway to Fiumicino Airport (about an hour), which we used on the return.
The apartment is on the first floor in a beautiful old building with a communal roof terrace; though was a bit too cold to enjoy as we were there in winter. It is perfect for two as a spacious one-bedroom apartment; there is also a single pull-out sofa bed in the living/ kitchen area.
It has a unique character and rustic style; however, tall persons beware when passing from the kitchen to bathroom to always duck or hit your head like I did :-).
There is no washing machine here, but there is a self-service laundrette within 50m walking.
The heating system worked very well, through the heat-pump on the air conditioner in the bedroom - it always felt warm inside (even when it got down to -4c degrees outside).
It was generally pretty quiet and peaceful, however the external (small) window from the bedroom faces out into the piazza, which can become noisy during holiday time.
Overall we had a great time and would recommend Giovanni's apartment for a holiday break to explore Rome.