Ivan's apartment is comfortable, and clean, it has everything you need for a short or long stay. Ostia is peaceful and the apartment is close to the bus stops/train.
There are many markets close by, you have everything within walking distance.
Ivan & Sergio let me check in early, I didn't know how to turn on the hot water, and in less than 10 minutes I had Sergio helping me out.
Kind, attentive, and offering a beautiful apartment. I recommend Ivan's apartment for solo travelers and groups.