The apartment is really nice, it has everthing you need and more. We were travelling with 3 Adults and a one year old. Baby bed and high chair were available which made our stay very conveniet. The area is a nice neighbourhood, a street with restaurants and supermarket is only 2 blocks away, the street of the apartment is rather quiet. The metro station (Manzoni) is less than a 5 minute walk away. To get to the Colosseum it is a 5-10 minute walk away.
We found the location perfect for a nice weekend in Rome. Marco the host was very helpful and gave a lot of tips i.e. for sightseeing and eating out.
I can definetly recommend staying there.