I really really highly recommended Arianna's place. It made my weekend in Rome as a solo traveller. Arianna and her family offered a homely stay in a clean, comfortable, well-decorated en suite room and Roman breakfast all provided with the most welcoming smile. I was given great local recommendations e.g. for where to eat and some good local running routes in training for my half marathon. A taxi was booked for me for my onward travel as I had a heavy suitcase, but the B&B is really well connected -next to Ostiense station and near Pirámide station with connections to all the city attractions and walking distance to the Circo Máximo, Palatine Hill and the Colosseum.