You can stop your searches here, you have found the Roman gem you're looking for! This apartment is absolutely great: the location is in the heart of Trastevere, where the Romans come for dinner or a drink, so you'll be in the perfect spot to go out at night. It has AC in the living room and the bedroom so you will be able to close the windows and have a peaceful night, away from the noise of the street. It's walking distance from all the Rome landmarks. And the terrace... absolutely amazing!
Micaela, who welcomed us, was incredibly nice and spent some time to show us on a map the best addresses to try. There is also a booklet with all the addresses per neighborhood.
In the same street you have a cheese and wine shop (Antica Caciara) to prepare some appetitive on the terrace or bring back so cheese with you! The staff there is so nice and will provide all the advices you need.