We spent one night at Flavia’s place in February. I wish it was summer, so that we could enjoy the swimming pool and go to the beach. The apartment is very clean, well equipped, easy to find (we had a car). The kitchen was staffed with food for breakfast. There is a supermarket in just a few minutes on foot.
I would highly recommend this place if you want to visit Ostia Antica, and stay close to the sea and the airport. Great value for money!