We spent three days in Rubina's fully furnished, very clean apartment within walking distance (about 2.5 km) of the Colosseum and Forum Romanum and right next to Villa Borghese, which is a large park ideal for walks.
The hosts were very responsive, and check-in and check-out were easy as agreed upon.
We would highly recommend this apartmnt to anyone spending a time in Rome.
A note to people who are driving: Parking is not included, and street parking is pretty much non-existent. However we parked at a nearby hotel, NH, which was very convenient and a 2-3 minute walk away. The cost was 35-45 Euro/day depending on the vehicle size.