Garbatella is the best area to have a fully local experience! Best food I have tried in Rome (ice creams, pasta, coffees, etc), full of parks and good atmosphere. It's quite close to the city center and it allows you to scape from the stressful traffic of the city.
Stefano's place is super nice and cozy. The WhatsApp group communication was super efficient and they replied to all requests in minutes. Great host! I will stay again for my next business trip to Rome :)