We stayed at Nicola's place with my 2 two kids (9 and 6 years old) and had the best experience imaginable. The apartment is truly located just across the street from the Colloseum. There is also a 24 hour grocery store across the street and a great breakfast spot next door ( with American pancakes! Yummy! You don't need a car, there are taxis everywhere in the neighborhood. The bedrooms are huge and everything was clean and almost perfect.
The host was absolutely amazing and easy to contact. We recieved great reccomendations for dinner and the host made us feel at home.
The place comes with everything you would get at a hotel and dishes if you want to cook.
The WiFi is strong, so my kids could watch their tablets while we drank wine, looked out the window, and marveled the sun peek through the Colloseum walls. The bedrooms all have their own bathroom and plenty of privacy and the walls are thick.
The apartment is totally walkable to many of the other tourist landmarks in Rome