Devis place is really in the heart of Trastevere. Its an amazing area, lively with amazing restaurants and bars around. The location is great if you are looking to be in the middle of this lively environment. I had no problems with noise.
The communication with the host was perfect and the local tips very useful even if this was not my first time in Rome.
The place is cute, however the pictures may be misleading as the place doesn't look as bright and tidy as pictured.