Nani's apartment is lovely and in a great location.
Trastevere has lots of good non-touristy restaurants and it has a local feel yet it's within walking distance of the big sights. The bedroom has a view of a square and the windows let in lots of light. Double glazing means they also keep out the sound.
It is a lovely apartment that is super clean, light and airy with a decent bed and hot shower.
Good eating recommendations from Nani too - Mr Clood opposite does incredible fresh pasta.