We were four girls traveling around Europe and found the Comics Guesthouse absolutely delightful! We only stayed one night, but the owners were very friendly, the room, common areas, and bathroom were spotless! Each room also had a very cool comic theme!
There is only one bathroom. However, it is shared by only five rooms. We were only there one night, and never found this to be a problem. Since we only stayed one night we didn't get to explore the area, but there is a metro station very, very close making it convenient to travel around Rome.