I stayed in Monica's flat with my husband, our two year old, my dad and his girlfriend. The space was perfect for 4.5 people! Monica's home is clean, comfortable and has everything you need. While it isn't super central, it is an easy walk to the Vatican and a easy metro or taxi ride anywhere else. Also there's a nice supermarket minutes away!
But the best part was Monica. She was SUPER flexible about our arrival time and helped us book transfers. She set up a cot for us, provided children's toys and gave great local recommendations. 100% recommend her place for a family place to stay in rome.