Our stay in Testaccio was great! We stayed in Rome for 4 days and getting to all the sites and activities (Colosseum, Vatican, Roman Forum, etc.) was simple with Lime scooters (very fun!), on foot, or by the very occasional taxi/Uber. The apartment is located within walking distance from amazing restaurants and nightlife throughout Testaccio and Trastevere, our personal favorite.
The shared bathroom was our only trepidation while booking this room, but it was very well kept, clean, and sharing with other guests was never a problem.
Highly recommend this room to anyone looking to see Rome on a budget!