Amazing place to stay, away from large crowds but right next to a Metro C station so getting to the city center is super easy (~30 min ride, Metro C + Metro A, but watch out for the ticket vending machines that take coins, we lost some euros to one that had a malfunction). Monica's apartment is both comfortable and practical i.e. there is a sofa and a TV you can stream to, and there is also a washing machine and an actual oven. She was also super helpful and responsive during our time in Rome. Thanks Monica!
One last note. Centocelle is full of restaurants and bars but it is not the typical touristic area (which I presume you know if you are considering to stay there, but still). People are incredibly friendly and willing to help, but do not expect fluency or even a basic level of any language other than Italian.