The biggest plus is the location! You are within walking distance of everything, especially the Spanish Steps and Trevi Fountain. With that in mind, it can definitely get loud outside this unit, since it is on the street side. Make sure to keep your windows closed if you want to avoid some of that. This unit can accommodate 1-2 people, no more! It looks bigger in the photos, but it works if you are literally just there to sleep and get ready. The bathroom has limited counter space, with no full-length mirror or closet to hang clothes. There is only a smaller armoire in the unit.
Overall, it's a perfect choice if you are looking for a simple stay in Rome.