Great apartment, very spacious, and although the listing doesn't state everything included, apart from beach towels and the like which we brought with us, everything we needed was in the apartment. Cupboards were stocked with essentials like olive oil, coffee, tea, condiments and biscuits, and Caroline had even bought a few items and left them in the fridge for us. Caroline was very accommodating as we arrived very late after a number of delays and was very flexible. The apartment was very clean, well furnished and bigger than we expected! The 5 of us were extremely comfortable here and had oodles of space during our 2 week stay. As for the area there is a place 2 minutes walk opposite next to the entrance to the free beach that does some of the best cornetti (Italian croissants) in Ostia, and a great Pizzeria a few doors down. We would also recommend the organic gelateria just round the corner, and one right round the back of the block, which were both exceptional! In August heat with a 7 year old it took us about 10 minutes to walk to the overground (nobody walks fast in Rome in August, I think a 5 minute walk out of the summer heat) and from there about 40 minutes after changing at Piramide onto the Metro, right up to the Colosseum. The centre of town where all the eateries and cafes are is about 5-10 minutes walk, and there are all sorts. We would recommend Pesche Fritto e Baccala which is tiny and simple (basic fish and chips, but oh, so much better) -they do a mean fried seafood selection. Also Salus on the sea front was good, and a Spanish place (a l'Italiano) a few more minutes walk along the front in front of a beach called La Conchiglia. They do Spanish evenings with live music, but of course all with an Italian seafood slant.
We also found a small supermarket and a few other shops, about 7 minutes walk past the kids play park behind our block, and if you go there you must go to the fruit and veg shop. The guys in the shop got us to taste so much amazing fruit we were full by the time we got home - and even our Italian family commented on how exceptional the fruit was! I would definitely recommend this apartment and we may well book again when visiting our family in Ostia in future.