We loved Elenas apartment for its style and location.
Its 5 minutes to the testaccio market where you can buy fresh vegetables, meat and bread. There are also some nices stores offering ready prepared food for fair prices. Most sights are easy reachable by feet or public transport.
By walking about 10 minutes you can reach piramide station. From here its 30 mins train to the sea and you can reach ciampino airport with 1 change for 1,50€ pp.