We stayed at Xiuying's aunt's place as the original apartment was not available. It was a cozy double room with a tiny private bathroom. Nice hosts, spoke little to no English so communication was a bit difficult but we got by with images of what we needed. We did not have access to the kitchen here. The apartment was in a very central location, right in front of Termini station. We were able to walk everywhere from here (15-20 minutes to colosseum and about about half an hour to all the other main sites). The only negative is that this area is quite inhabited by street vendors and homeless people and has a terrible urine smell. Not sure about the safety of this area for this reason, but we had no problems ourselves during our 3 night stay.