Had a most pleasant stay at Joy's place. The flat is well-located, within an easy walking distance from a metro station, a bus stop and even a train station (so if you want to take a cheaper (8 euros as opposed to 15), slightly slower train to the Fiumicino airport, you can use Roma Tuscolana). The district is lovely, it's not touristy and has a nice feel about it. The flat has all you need. Thanks to two bathrooms, you don't have to wait to have a shower in the morning.
Joy quickly answered all my questions and I generally had no issues whatsoever. Thanks once again!