We had a wonderful stay in Giulias apartment and I can highly recommend it for a Roman holiday.
It's a cosy and very cute place. The neighborhood is great, far from the crowded touristic spots, but close enough to walk to the city center. Trastevere with a lot of bars and restaurants is very close, too. If you are tired of walking, there is a bus stop for several bus lines and there is also a metro station (line B) by only 5-10 minutes walk. The house is located in the typical Roman neighborhood of Testaccio with shops and restaurants, coffee bars and a very beautiful piazza. The apartment has a living room and a sleeping room which is very calm as it's situated towards the courtyard of the housing complexe, and has a comfortable bed. It's a smart historical building, with an interior that seems to have been renovated very recently, all new and modern. The apartment is clean and tidy and you find there everything you need. The kitchenette is very well equipped, too – I recommend the local market just around the corner, where you can find fresh and tasty fruits and vegetables and all kind of italian ingredients for cooking.