The apartment was just wonderful like a picture from a magazine.
The location is super - 25 minutes by foot from Termini, 40 from Colosseum. Metro station is behind the corner. The district is full of green, cafes, shops etc.
Serena turned out very hospitable and attentive, she gave us some advise.
Next time I am in Rome, I will stay at Casa di Gi for sure!
Serena, thank you