Simone's apartment in Ostia was perfect for our working vacation week! It was relaxing and peaceful, a very short walk to the free beach by Hakuna Matata beach bar which we enjoyed almost daily, as well as a delicious pizza stand around the corner (Il Chioschetto). Kitchen had everything we needed to buy our own food from the nearby grocery stores and cook meals, bed was comfortable, and WiFi worked great! Apartment was also walking distance to a good variety of restaurants and bars when we wanted to venture out, and shopping as well. No need to have a car to get to anywhere you might need to go. Very local vibes, not touristy at all, but everyone was super nice and welcoming to us even though we speak only English. :)
Simone was also very kind and flexible to let us check in early at 10am when we asked, since the apartment wasn't occupied. We really appreciated this!
One thing to note -- we weren't able to use the clothes washing machine as advertised, since there was a problem opening the door that leads to it. Also you need to bring your own laundry detergent. Just something to note if you plan on doing any laundry!
We would definitely stay again if we found ourselves in Ostia. Awesome place to just hang out & take it easy by the beach!