With my boyfriend, we had a nice stay in Rome and particularly in Elisa's appartment. It is very cosy, clean and has everything you need to feel you like at home.
The appart is rather close to the Roma's center: 15 min to Termini station by bus or tram. I'd say that the district where it is situated is alternative, that's not really what I like, but my boyfriend loved it.
Another point. Elisa (we didn't see her in person) and Luca were always accessible by phone and helpful.