We had a lovely stay in Rome. The apartment was perfect for our needs. During the weekend Trastevere is buzzing and you can hear people having fun and enjoying life until late at night. Most of the noise is cancelled by the windows but if you are a light sleeper, you can bring some earplugs with you.
But this is not a complaint – just an advice. This is just how it is living in vibrant Trastevere and we loved it and would return anytime.