Overall I still enjoyed the stay, the location in Garbatella is amazing and it is only 15 minutes walking till Piramide station and you can also walk to Testaccio. However, there where some issues: I didn't know it was a shared living room, I had nice roommates, however, they liked to shower at 4 a.m and my room was right next to the bathroom (so that was super loud). Furthermore, the host is very nice but she entered my room multiple times, without any warning (and to my shame I had dirty laundry and some empty bottles laying around when she entered which she complained about).
In the end, I accidentally spilled laundry detergent on an old couch, which she asked me 45 euros for, which I paid.