We spent 3 nights in a group of 7 including 2kids under age 3.
Very very lovely and comfortable rooms! We had been afraid the steps to upstairs might annoy one of our group members who was old and could not walk well, but it was a needless anxiety. They are low steps and easy to walk.
The apartment is in a wonderful location! We used taxi a lot for moving around in a group. There is a taxi stop near by the apartment so we could find a big taxi quickly anytime. It was the most convenient point for us. Of course very easy to tell a taxi driver where to go when we were back, just saying " to Piazza Navona".
Before our trip to Rome, Alex kindly offered us to arrange a van as a transfer between the airport and the apartment. The arranged drivers were so polite and the vans were clean.
We really recommend this apartment for family stay!