Our family of 4 (with 2 teenagers) stayed at Rocco's place. Note that it does not have a kitchen nor washer, however it does have a mini fridge and is very thoughtfully filled with water, juice, milk, and yogurt. Rocco also left some snacks. The place is very clean. Beds are very comfortable (1 on main floor and 1 in the loft), and the washroom is a good size and very clean and seems quite new.
It is about 10 mins. walk from Termini Roma and within walking distance to the Colosseum. There is a super market around the corner and lots of restaurants nearby.
The apartment is on the ground floor and there are cars parked right outside. Unfortunately I am a very light sleeper and the street noise really bothered me. You can hear car engines starting and/or people talking as they walk by.