Serena welcomed us nicely with her brother, on time.
The flat is nice and clean.
The rooms are fine for 5 people, with space to keep clothes.
Convenient kitchen, Serena even prepared a few things (tea, jam...).
The place is not that central but it is ok, we did walk and sometimes took the bus just in front of the house, or the taxi.
One negative point : no flexibility regarding arrival and departure time. Luckily there is a luggage storage at Termini train station, not that cheap (we were unlucky at our departure since it took them over 30 minutes to find one of our suitcase).
Overall, positive
Thank you Serena