Vito is a really great host! Communication was great, he was ready to answer any questions. Also, he showed to us town by car and all places we need (some sites, grocery store, free beach).
The apartment is very cute and clean, with all needed (even an umbrella for the beach). Despite there is no air conditioner in the flat, it's always fresh.
I would definitely recommend staying at Vito's place if you are going to visit Ostia.