This place is super nice and totally to recommend. We have been traveling with our two young children and it was a great place. The apartment is perfectly equipped for small families. The photos don't do the courtyard justice, it's much larger than it appears on the photos. Also dining room and sleeping room were bigger than expected. The courtyard is shady and for hot summer days perfect. The apartment was perfectly clean and the bed in the bedroom super comfy.
In 5 min walk you can reach a public beach with a nice beach bar, a supermarket and the train station with connections to Rome every 15 minutes. In the same building of the house is a gelateria with delicious ice cream and some meters away there is an Irish pub.
We were there end of September and beginning of October and it was most of the days still sunny and warm.
Stella was always available for questions on the phone and super friendly.
Thanks a lot for the stay at your place! We think that Ostia is a insider tip for families :)