Had a very pleasant staying in Macris Dom with my wife, the apartment is next to metro (50 metres, hard to find in Rome!!) and within walking distance from Coliseum.
In the house everything is extremely cozy, new, clean and, most important, WARM! Daniele, the host, was very helpful with everything we needed and very prompt when contacted through the airbnb application, giving us helpful advices about restaurants. Comfortable beds and well-equipped kitchen made us feel like home, we would come back here again and we warmly advice Daniele as your host for your vacation in Rome!