We were four people in this flat and loved everything about it. There were two large bedrooms with double beds and a smaller room with a 1.5 bed and attached bathroom. The flat is very spacious, and there is even a large rooftop terrace, with a perfect view of St. Peter's church and the Vatican City.
The location was perfect and in walking distance to all the main attractions. The area is not that touristed, yet full of excellent restaurants, cafés, etc. in all price ranges.
Elke was very helpful and responsive and helped us arrange transport from and to the airport. Everything went without any problems. If we come back to Rome we will definitely stay at Elke's place again.