Everything about our stay in Ostia was lovely and the apartment came exactly as advertised. It was a short walk to the seaside and there were some nearby supermarkets and plenty of restaurants. The AirBnB hosts also have their own restaurant so I would definitely recommend checking that out too.
Transportation was good from Lido Centro to anywhere we needed to be in Rome. One thing I would suggest would be for guests arriving from the airport to take a bus from the airport as taking a taxi ranged from €45-65 depending on the driver.