Isa's place is very conveniently located. It is close to Ostiense train station, which meant that we could take the FL1 train from the FCO airport and walk the 10-15 mins to the flat. We sent a message to Isa when we picked up our bags at the airport and Sergio met us at the flat and gave us a quick tour. The flat is clean and the bed is comfortable. Being on the first floor, there is some noise from the street, but it is fine. Access to netflix and the nespresso machine are very nice as well. There is also A/C and a washing machine. The flat is about 15-20 mins walk to the Colosseum and an hour walk to Vatican City. It was perfect for us and we got in a lot of walking. There are also lots of restaurants and shops near the flat and even a market for fresh fruits, veggies, meat and cheeses.