I stayed at Sara's and Daniele's apartment for two months while i was completing my legal internship in Rome.
The apartment was excellent, really cozy and provided all the necessary stuff for someone to stay there. Sara and Daniele were both extremely kind and helpful with everything i needed and they were always available to deal with minor issues that arose.
The area of the apartment is a residential area and it is really quiet with no annoying sounds.
Two metro stations are nearby [5-10 min walking distance] and from there in 20 min one can be at the very center of Rome [Piazza di Spagna or Barberini stations].
All in all, a very good apartment and two excellent owners.